Yuri Briar/Synopsis

== History ==
During his childhood, Yuri lived in Eastern Nielsberg in Ostania with his family and enjoyed eating his mother's cooking, which he still remembers fondly. After both of his parents passed during the war, Yuri and his older sister, Yor, became orphans, causing them to be poor to the point that they were unable to afford schoolbooks for themselves. 
Yor took on the role of their mother and began raising Yuri herself. Yor was also able to find work, and used the money she earned from it to buy Yuri's wants and needs. Under Yor's care, Yuri was subjected to her cooking and accidentally beaten up by her, which resulted in him developing a strong and tough body in the future. Despite that, Yuri deeply appreciated and cared for his sister and did not like seeing her get beat up for his sake. Around this time, Yuri began developing sister-complex tendencies to Yor and began doing everything he could to make her happy and have her shower him with her affections.
Feeling helpless to support Yor, Yuri began studying as much as he could so he could be able to help her with anything. In time, Yuri became the one teaching her things and helped her with her studies. As they got older, Yuri and Yor moved from Eastern Nielsberg to Berlint. At school, Yuri displayed his intellect and was able to skip grades, and at 14 years old, he was already at college without even completing high school. There, Yuri was rude to his peers and did not socialize, still focusing on his powerlessness and devotion to Yor. Yuri also used his fortitude as a crutch, as he spent a week of all-nighters preparing for a test, only to miss the day he was supposed to take it.
Eventually, he was offered and accepted work as a diplomat at the Ministry of Foreign Affairs and used his first paycheck to buy a bouquet of roses for Yor as a gift. A year before Operation Strix, Yuri was recruited to the State Security Service by the Boss, and began working there with the goal of protecting the country his sister lives in.
== Synopsis ==
=== Introduction Arc ===
Yuri calls Yor to ask how she has been and when she is going to get married. He explains that he may get promoted at work, which would make him too busy to look out for her, which makes him worried. He offers to introduce her to someone, but Yor lies that she already has a boyfriend who she will be taking to Camilla's party, so he says he will ask Dominic for a full report on him. At the end of the call, Yuri says that he will be the one to drive out her boyfriend if he turns out to be a bad person and is looking forward to hearing about him.
=== Eden Beginnings Arc ===
When Anya runs to her room after getting frustrated with studying and refuses to leave, Yor comments how this situation reminds her of when she used to fight with Yuri when he was little. Loid and Yor then talk about the younger Briar sibling, who Yor admits has always been much smarter than her. As Yor remembers Yuri teaching her things, she tells Loid how her praise would always cheer up Yuri. Loid assumes that her approval motivated him to work so hard, which Yor suggests that Loid does for Anya. Elsewhere, Yuri returns to his apartment and runs into Dominic, and they talk about how busy the latter is at work. Yuri then remembers the party and asks Dominic what Yor's boyfriend was like. Confused, Dominic asks if he has not congratulated Yor on her marriage, and Yuri is shocked to hear that his sister has gotten married.
=== Secret Police Arc ===
At city hall, Yor is reminded that she forgot to tell Yuri about her marriage to Loid. When Millie asks if Yuri is hot, Yor shows her a photo of her and him. As they talk about how cute Yuri looks, Yor brings up how Yuri would always cling to her, making her co-workers realize that he has a sister complex.
At the SSS headquarters, Yuri takes over the interrogation of Jim Hayward, who was detained for suspicions of espionage. Yuri greets Jim and starts gushing about Yor, talking all about her. He tells Jim that he plans on visiting Yor to celebrate her marriage, so he wants to wrap this up quickly. Jim feigns innocence, so Yuri produces two photos of Jim dealing the documents to someone, shocking him and a fellow SSS officer. The officer asks why Yuri says he forgot to turn them over, and he asks Jim if cooperating seems more appealing now.
Jim finally gives in, admitting that he made copies of documents his clients needed and handed them over for cash. He also admits to not knowing anything about his client aside from that he is from the West. Yuri presses for more details, but Jim tells him he does not remember. Yuri's face then turns cold as he asks the man if he has heard of "Twilight." Jim says he does not know who that is, and Yuri explains that Twilight is a master of disguise from the West capable of throwing the country into chaos, the natural enemy of the SSS. Jim asks if he will be let go if he can help catch "Twilight," but Yuri reminds him that if he feeds the SSS nonsense, it will add to his crimes.
Jim says he just wanted cash to mess around with girls, and when Yuri reminds him of his wife, Jim reasons that he, as a man, should understand. Yuri's face once again grows stern, and he explains that he has been keeping his job a secret from his sister because he does not want her to know about this dirty work. He then slams Jim's face into the table. He says that what Jim has done is treason and that, unlike Jim, Yuri loves his family and will do anything to protect the country his sister lives in.
Having finished the interrogation later than he had hoped due to getting riled up, Yuri heads to the Forgers' apartment with a large bouquet in one arm. He starts skipping down the street, excited over meeting with his sister again, but abruptly stops when a rib Yor broke through a hug during their childhood begins to ache. Yuri thinks about how overwhelmed he must be by her love, then wonders why she never told him about her marriage. He assumes the reason must be so scandalous that she could not have possibly told him. As he makes his way to the apartment, Yuri reminds himself that he cannot let her see his secret police face, the side of him he does not want her to know about. Yuri arrives at the door, and the Forger couple welcomes him while Yuri hides his dark glare.
While Loid and Yuri greet each other, Yuri intends to find out if Loid is worthy of his sister, which he doubts. Loid offers to put Yuri's belongings away, but he refuses. After Loid tells them to catch up while he makes food for them, Yuri thinks to himself that he would not want to eat something Loid made. Yor remarks that his face is scary and comments that he must be nervous. Yuri worries that he accidentally let his hostility show since he has not calmed down since the interrogation, and he pledges to act as a diligent civil servant in front of Yor.
As they settle in the living room, Yor arranges the flowers Yuri brought in a vase and thanks him. Yuri makes it clear that he disapproves of Yor's marriage, telling his sister that it is just too sudden, and he asks her why she kept it a secret from him for a whole year. Yuri presses for an answer, and Yor simply tells him that she forgot to tell him about it. Confused, Yuri brings up their earlier phone call when she mentioned having a boyfriend and asks why she did not inform him then. Yor answers that she had forgotten that she forgot to tell him. Losing all reason when it came to his sister, Yuri is satisfied with her answer, laughing it off as he apologizes to her, adding that she can be such a klutz sometimes.
Loid returns with the food, and as Yuri angrily thinks about how Loid should not butt in on their conversation, he catches himself as he realizes that he must be nice to Loid, or Yor might hate him. He takes a bite and is surprised at how good it is, helping himself to more as Yor comments on how good Loid's cooking is. Yuri tells himself that he will not be won over by food as he produces a bottle of wine that he bought and invites Loid to drink with him, intending to loosen his lips to expose him. Yuri starts asking the two how they first met, and they explain their first meeting at the boutique. They tell Yuri that after a series of dinners together, they eventually hit it off. Yuri then starts asking specific questions, like what food they ate, when and where, how many times, the restaurant names, when they started committing to a relationship, and their reason for marrying.
Yuri asks Loid what he calls Yor, and he simply replies with just "Yor." Thinking that calling his sister by that name is their thing, a panicked Yuri asks Yor what she calls her husband, suggesting nicknames like "Loidy" or "Loi-Loi." Yor is too embarrassed to speak, and Yuri assumes it is true, picking up the wine as he starts to drink to ease his pain. Yor vehemently denies his assumption, saying she just calls him "Loid." Loid asks Yuri if he is okay and brings him water, which he begrudgingly accepts. Wondering what Yor sees in him, Yuri thinks Loid is a good cook, tall and handsome, seems considerate, and is even a doctor. Realizing that he just brought up Loid's good points, he resumes drinking in frustration while Yor tells him to slow down.
After calming down, Yuri is asked about his work, and Yor tells him that she heard from Dominic that he went to Hugaria. Following the Ostanian Intelligence manual for deception, Yuri explains that it was for work and tells her about his trip to the country, mentioning a café that was said to be the Empress's favorite back in the day. This catches Loid's attention, and he asks Yuri if the café is in the capital city of Obda, saying he went there when he was a medical student. As they chat about the country and the wine he brought, Yuri continues following the manual's examples verbatim, unintentionally confirming the suspicions of Loid, who is actually Twilight, about his true job as a Secret Police officer.
After Loid tells Yuri that he will have to treat him to the wine another time, Yor asks Yuri if he is happy to have such a wonderful brother-in-law. However, Yuri angrily reminds them that he does not recognize the marriage or Loid as a brother-in-law. He explains to Loid how Yor's raising of him motivated him to become a successful man who could protect her, even flashing back to his childhood with Yor. He then asks Loid if he can understand having the most important person in his life being taken away by some stranger. He continues, saying that he always wanted his sister to settle down with someone who could protect her more than him, and asks Loid if he can do that.
Loid proceeds to tell him that he loves Yor as much as Yuri does, and whether from knives, bullets, or even a nuclear bomb, he will stop at nothing to shield her from harm. Stunned by Loid's response, Yuri drunkenly thinks that he could save Yor from knives and bullets, but not a nuke, and wonders if Loid is that capable. In denial, he starts accusing Loid of being a liar and accidentally spills a glass on the table. Yuri then watches Loid and Yor accidentally touch hands and awkwardly back away from each other, causing him to suspect the legitimacy of their relationship. Loid and Yor try to convince Yuri otherwise, but he is undeterred and demands proof that they are really in love. He proceeds to give them an ultimatum: kiss each other to prove their love, or he will petition to have their marriage annulled.
After Loid agrees to his demands, Yuri watches as Loid and Yor prepare to kiss each other. After seeing them whispering, he asks loudly if they will kiss or not, but is silenced by Yor, who throws a fork at him and grazes his cheek. After watching Yor push Loid down the couch and move in to kiss him, Yuri flashes back to his past, with Yor raising him and him wanting to marry her. Unable to watch Yor kiss another man in front of him, Yuri decides to jump in between the couple to stop them. A now-embarrassed Yor decides to slap Loid but ends up slapping Yuri instead.
Yuri flies across the room and crashes, waking up Anya momentarily before she returns to sleep. Yuri gets up with a bloody face and misinterprets the slap as Yor being mad that he tried to stop their kiss. Yuri concedes defeat for now, relinquishing his sister's lips to Loid, but is quickly slapped across the room again by an embarrassed Yor. Being drunk and having lost some blood, Yuri has trouble keeping his balance. Yor offers to call him a taxi and tries to help him stand. However, because Yor is also drunk, the two start staggering but are caught by Loid.
Loid tells them how much he admires how wonderful siblings they are and thanks Yuri for all the work he has done to protect and support his sister, then assures him that he will do everything he can to support her as well. Yuri pushes Loid away and announces his exit. Loid tells him he is welcome to come back and visit anytime for Yor and meet Anya. Yor adds that Anya tried to stay up for him but fell asleep. Irritated, Yuri announces that he will come back to prove that Loid tricked her into this marriage. Yuri gives Loid a warning that if he makes Yor cry, he will have him executed, but cuts himself off before saying the executed part. Yuri then rushes off as Yor wishes him a safe trip home. As Yuri heads home, he asks two men which direction the station is in. Shocked by his bloody appearance, they tell him to go to the hospital instead.
Yuri returns to work the next day, where the Lieutenant questions him about his injuries, aware of Yuri's meeting with Yor's new family. Yuri tells him that he barely remembers it, and the Lieutenant assumes he got drunk and picked a fight with her husband, but Yuri tells him that the man does not deserve Yor. When asked if Loid is a bad guy, Yuri recalls that Loid was nice but believes it could have been an act and that he is secretly a spy who needs to be locked up. The Lieutenant asks if there is any evidence, and Yuri realizes that he should have planted bugs.
He thinks more about it and realizes if he heard those sounds coming from his sister, he would not be able to bear it. As Yuri slams his head against his locker over the thought, the Lieutenant questions if his wounds were self-inflicted. The Lieutenant tells him if Yor is happy, he should give her his blessing. He tells Yuri that he needs to focus on the job and that catching Twilight is their top priority. Yuri agrees but tells himself that if Loid makes his sister cry, it will be a different story.
=== Doggy Crisis Arc ===
On the day of the East-West ministerial-level summit, Yuri waits outside Minister Brantz's hotel as a contingency from the Foreign Ministry to escort the minister to the conference. After Twilight disguises himself as Brantz, he exits the building, and Yuri is there to greet him, unaware of the deception. Yuri directs the disguised minister to the car he will be escorted in, adding that he will be leading the escort. After Yuri leaves, Brantz steps into his car's driver's seat and splits off from the escort, shocking Yuri and everyone else.
=== Midterm Exams Arc ===
Dominic invites Yuri to Camilla's place to help taste-test Yor's cooking. Yuri happily arrives and greets everyone, telling his sister he will not miss the chance to eat her home cooking again. Yuri learns she is taking cooking classes and asks him not to tell Loid, which irritates him. While Yor messes up while trying to prepare the ingredients, Yuri continues to praise her. After Camilla gets upset at Yor, Yuri gets irritated and wonders if he should make her disappear, but quickly changes his mind after Camilla tells Yor to divorce Loid, agreeing with her sentiment. However, when Yor begs for Camilla's help, so she does not divorce Loid, Yuri looks on in surprise.
After Yor completes her attempt at a minestrone, Dominic tells Yuri to eat up, so Yuri enthusiastically digs into the dish. He screams at how fantastic it is while constantly eating and throwing up the dish. Camilla and Dominic curiously decide to take a bite of the dish and fall to the floor. Yor then attempts to make a meatball, which Yuri digs into once again and proclaims how he is seeing more of his childhood memories with each bite, even seeing his mother beckoning him into the light. Dominic worriedly tells him to stop eating and put down the fork.
Camilla realizes that Yor, having cooked for herself and Yuri since they were kids, must have warped their palates, and an embarrassed Yor explains that she just wanted to make sure Yuri got all the nutrients he needed. Camilla asks Yor and Yuri if they remember any dishes their parents used to make, and Yuri remembers a stew their mother made, specifically remembering how it had a fried egg on top. Camilla then helps Yor recreate the soup. After finishing the soup, Yuri takes a spoonful and says it is not quite as he remembers. Camilla asks them where they are from, and Yor replies, East Nielsberg. Camilla comments that they put sour cream in stew around those parts, so she adds some. Yor and Yuri both take a spoonful of the stew and look at each other with surprise, realizing this is the stew they had as children.
Going back to the past, Yor fed Yuri her homemade omelet rice, which he happily ate up while vomiting it out. Yor also served him strange-looking pasta and cake, both of which ended in the same result. After eating, Yuri complimented his sister's cooking, saying she would land a husband in no time. Embarrassed, Yor slapped Yuri and ended up throwing him across the room. All this helped Yuri develop a strong body. In the present, the Lieutenant remarks how Yuri had been hit by a truck the other day when he was light-headed after pulling four all-nighters in a row. He warns Yuri to be careful, but Yuri assures him that he is fine.
As Anya's midterm exams are approaching, Yor calls Yuri to the Forger home to help tutor her. Yuri quickly arrives and is introduced to his niece, who attempts to read his mind and is overwhelmed by his thoughts about Yor. Upon sitting down in the living room, Loid and Yuri have a chat about the recent peace talks. Yuri believes Loid is mocking him for the heat the SSS got from the opposition party due to the conference being delayed by a terrorist attack (though those details were never made public). Not wanting to look bad in front of Yor, Yuri makes sure to make himself look good as a diplomat.
Loid wraps up their conversation to run some errands, but not before telling Anya that she and Yuri should get to studying. Annoyed at having to tutor "Loid's spawn," Yuri gives Anya some hard problems to solve, which she ends up getting all right due to her reading his mind. Surprised by her results, Yuri asks Anya why she even needs to study, but Anya tells him it was dumb luck, which he hesitantly accepts. They try studying again, but Yuri starts getting upset after realizing that she is not all that bright. After Yor asks him to be more supportive and Anya exaggerates her love for Yor, Yuri begins being kinder with his criticism.
Yuri and Anya continue studying, but after hitting some roadblocks, Yuri questions whether Anya likes studying. Anya questions him right back after saying she hates it, to which he replies that he studied as hard as he did so that he could take care of Yor. Yuri explains to Anya that "knowledge is power," and she can be or do anything she wants if she studies. While she misunderstands his statement, Anya gets very excited about the concept of studying, and the two intensely continue studying.
After an exhausting study session, Yuri questions whether Anya has mastered grammar yet, to which the girl questions what that even is. Realizing that he just wasted his time, Yuri angrily storms out of the house. While making his exit, Yuri realizes that he is the one who should be studying and that he does not have enough "power." Yuri believes that if he had more knowledge, he could have captured Twilight back during the terrorist incident and put an end to him, and he concludes that he is still powerless to protect his sister or his country. However, he returns inside for a brief moment to eat all of the cookies Yor says she just made, once again screaming at how good it are while eating and throwing it up.
=== Imperial Scholars Mixer Arc ===
Yuri is watching a room through a listening device as three men enter the room. He quickly assesses the position and skill of the men through their footsteps, determining that two of them are big and professional and that their target, Conrad, is sitting on the sofa. After Yuri announces that the deal has been made, the lieutenant tells him they are going in. The Lieutenant and two other members of the SSS enter, arresting the men on suspicion of espionage. Conrad attempts to evade arrest through the window, only to be disabled by Yuri, who was waiting outside.
Back at the SSS building, Yuri's superior praises him for his work and gives him another assignment to investigate Franklin Perkin, a journalist who writes several books and articles that slander Ostania. His works have been sold to Ostanian black markets and released in Westalis, and Yuri is to secure evidence of Franklin's crimes and his buyers and stop his work from influencing public opinion. The Lieutenant expresses some concern for the amount of work Yuri has been doing lately, but Yuri reassures him. Yuri is personally disgusted with Franklin for selling out his own country for money.
Yuri monitors Franklin, referring to him as Subject J-095, and carefully logs all his actions, from waking up to sleeping, as well as the appearance of fellow passengers on the train and his conversations with his co-workers. The Lieutenant is impressed at the number of details but tries to persuade Yuri to let someone take over as he has pulled two all-nighters in a row. As the Lieutenant reads the report aloud, Yuri twitches in response to some words that sound similar to Yor and gets told to rest.
Following Franklin outside and observing his movements, Yuri and the Lieutenant see how he makes his articles. Yuri watches Franklin bully children for a new article and is enraged by this. Listening to Franklin as he writes his article, he hears his conversation with his father about wanting to make the country a better place for his family to live in and provide for themselves and wishing they had more money so his mother would still be alive. Yuri wonders if Franklin is motivated by concern for his family on the report but rips it out and crumples it.
Five days pass, and Yuri continues to monitor Franklin, noting no signs of attempted contact with his publishers. He then realizes that Franklin does it while working at the post office, sending out his manuscripts by slipping them into mail cleared by the postal monitors. After Yuri watches Franklin discreetly slip the manuscript into the mail, he seals his fate. Four days later, Franklin prepares to leave but sees Yuri and SSS officers waiting outside the apartment. Franklin accepts his fate, and after he walks outside, Yuri informs him that they have already arrested the publishers.
Franklin expresses appreciation for them waiting outside, and Yuri tells him there was no reason for his family to witness his arrest while placing handcuffs on him. Franklin then asks Yuri which of them is the true disgrace, but Yuri tells him that he would never do anything to cause his sister pain. As Franklin gets escorted away, Yuri says he will submit an application for his father to receive financial assistance, and Franklin thanks him.
After the arrest, Yuri's boss pats him on the back, proud of his subordinate. The boss notes Yuri's workload and asks if the stress is not catching up to him. Yuri denies this, saying that this is the perfect job for him, and swears to protect their country and to catch Twilight. Later, Yuri drops by the Forgers' home with the whole family inside, including Loid, much to Yuri's annoyance. When Yor asks if something is wrong, Yuri says he just wanted to see his sister's face. Yor pats Yuri on the head and makes some tea for them, and the excited young man's thoughts are filled with his sister, which unintentionally overwhelms Anya.
=== Cruise Adventure Arc ===
On her subway ride home, Yor spots Yuri dozing off on the same train. She approaches him and asks why he is on a route that he usually does not ride, for which Yuri explains that he is on his way back from a work trip (though he was actually arresting a dissident). Yuri initially accepts her dinner invitation at her place but declines when he remembers Loid and tells Yor that he will never accept him. As the subway approaches Yuri's stop, he reassures his sister that he is not a child anymore and can take care of himself. Once Yuri gets off to his stop, Yor wonders to herself why, since Yuri no longer needs her help, she is keeping her assassin job.
During her mission to protect Olka Gretcher and her son on Princess Lorelei, Yor thinks about Yuri, Loid, and Anya while questioning her reasons for being an assassin. Back in Berlint, while chasing a suspect with the Lieutenant, Yuri collapses on the ground, having suddenly caught a cold. After returning to headquarters to rest, Yuri explains that his immune system breaks down whenever he remembers that Yor is away. Yuri apologizes for letting the suspect escape, but the Lieutenant tells him not to worry and rest up while he gets medication. As he heads out, Yuri asks for a specific brand of herbal tea. As Yuri lies down, he flashes back to the time he got sick as a child.
Yor does her best to nurse Yuri back to health, to little effect, but the siblings are grateful to have each other, and Yor asks Yuri to stay strong and healthy forever. After remembering the terrible medicine that Yor gave him, Yuri wakes up in a sweat, and the Lieutenant asks if he is okay. The Lieutenant says he got the herbal tea, which tastes awful, and asks Yuri if he wants it. Yuri says it is the one that works best and tastes most like Yor's brew. After throwing up the tea, Yuri energetically tries to get back to work, but the Lieutenant yells at him to go to bed.
In her battle with the Swordsman, Yor flashes back to when Yuri got a job offer from the Ministry of Foreign Affairs and got his first paycheck, now able to live independently from her. After some self-reflection, she remembers her motives for becoming an assassin: to protect his carefree life, which she now finds more important than ever with the Forgers in her life.
After the Forgers return from their trip, Yuri quickly visits and celebrates reuniting with his sister, shouting for joy when she gifts him a souvenir. After a dejected Anya returns home and sits in the living room with everyone, she tells them how she lied about her trip to her classmates. After Anya tells Loid that she lied to get attention, Loid tells her that lying is wrong. In his thoughts, Yuri explains that he deals with liars all the time and how they are worthless trash. He also justifies his own lies, saying they are for Yor's sake and that anything would be righteous if it were for her. However, he simply tells Anya that all liars are trash. Yor agrees with them, and the room quickly falls silent. Anya then says that she will try to stop lying, as being a liar seems pretty rough.
=== WISE Arc ===
As the lives of the Berlint citizens are shown, Yuri is seen in the SSS building, eagerly eating and vomiting desserts made for him by Yor, who left a note wishing him luck on his work.
=== Friendship Schemes Arc ===
On his free day from work, Yuri visits the Forger apartment to have fun with his sister. When he sees Yor's injured wrists, he immediately blames Loid. Yor tries holding him back but strains her wrists. Upset at seeing his sister suffer, Yuri tells Loid to cook in Yor's stead, unaware that Loid typically does it already. Loid and Yor head to the kitchen to start cooking, where she expresses her appreciation for Loid's kindness. Hearing this and wanting Yor's praise too, Yuri decides to take over the cooking. Yuri cooks more dishes than Loid, though they all emanate a strange aura.
Because Yor cannot hold a fork, Yuri offers to feed her his dish. After eating, a nervous look on her face grows, and Yuri worries what it could mean. Upset, Yuri tells Loid to feed Yor his own dish. Yor says she can feed herself, but Yuri insists, saying it will prove Loid's love for her. Loid tries feeding Yor, and she starts blushing. Yuri yells at Loid not to feed her in front of him and tells Anya to do it. After being fed, Anya asks Yor if the food is good, and she says it is delicious, shocking Yuri.
Defeated, Yuri slams his fist on the floor and pushes for another battle with Loid in cleaning the dishes. While they clean, Yor thanks the men for helping, making Yuri so happy that he drops some dishes. Upon finishing, the adults look at the results and see that Loid cleaned the most, whereas Yuri has broken several of them. Yuri challenges Loid to several more chore battles and loses each one. Realizing that he cannot beat Loid, Yuri begins to wonder if Loid is more capable of taking care of Yor than he is.
After Yor says they have used up all their detergent and garbage bags, Yuri declares a final challenge with Loid to see who can buy the best stuff the fastest and for the least money. After obtaining the list from Yor, Yuri quickly dashes off. Yuri goes to a shady part of the city to meet with an informant. After revealing his Secret Police badge, Yuri demands to know where he can buy all the cheapest items on the list. After buying everything, Yuri rushes back to the Forger home, ready to prove to Loid not to underestimate the power of the SSS, only to see that Loid had bought everything and arrived home before he did.
Yuri cries and admits defeat, falling to the floor and spilling the items from his bag. Yor walks over and spots a package of whistle candy, one of their childhood snacks. The siblings reminisce about going into the mountains when they were young and whistling with the candies to scare the bears away. Yor cannot believe Yuri found the candies after all these years and she thanks him. Loid props up Yuri, saying he knows his sister better than him. Yuri eats up the compliment and declares this his victory before leaving, laughing maniacally.
=== Red Circus Arc ===
At SSS headquarters, Yuri overhears that the extremist Red Circus group hijacked two Eden Academy school buses, one of which has Anya on it. He confronts the Lieutenant about the situation but is ordered not to come with them, as Anya might recognize him and not tell city hall about this. Yuri is initially apathetic about Anya's situation, but after imagining Yor grieving her, he rushes after the Lieutenant, telling him to wait for him.
Because of his insistence, the Lieutenant ties Yuri to a pillar to prevent him from getting involved in the case. Yuri then overhears that one of the missing buses was last seen in Demforest District. Yuri begs to be released to investigate since he has informants in the district who can get him to the location. After Yuri gets released, he quickly gets to work, searching for clues. He asks an informant about a school bus passing through suspicious areas. Yuri knows it would be a problem to ditch a bus and then transport forty kids in cars, so he decides to scour the area where the bus may be hidden. Looking around, Yuri finds bus tire tracks, which lead him to a warehouse hiding the missing bus.
After confirming the bus's location, Yuri calls a team of SSS agents to raid the warehouse. After an agent counts six people inside, he orders the others to wait until all of them are outside the bus to strike. Outside the building, Yuri and two other members wear gas masks while preparing some tear gas, then get orders to move in. Two members are immediately shot and killed, and the gas is thrown into the building.
As more Red Circus members continue to fall, their group leader Bruce attempts to retreat into the bus. Yuri grabs and punches Bruce but gets shot in the shoulder. He then expresses his disgust with Bruce for hiding behind kids and hits him with a knee strike. The agents report the hostages safe and one wounded, as Yuri's wound gets treated. While screaming out in pain, Yuri asks why he must suffer like this for Anya of all people. As the young man was lacking in motivation, he had an absurdly low threshold for pain.
=== Mole Hunt Arc ===
While recovering from his shoulder wound, Yuri has a phone call with Yor, which he later claims to have healed him instantly. Yuri makes a surprise morning visit but arrives just as Yor tells Loid that she is dissatisfied with their life together. Yuri is shocked to hear this and quickly pesters Loid about it, almost threatening to have him executed. Yuri wants to chastise Loid but realizes aloud that he could get Yor to dump him if she stays mad at him and tells her to divorce him, but she refuses. Loid asks how long Yor has been griping, and she answers since yesterday, further angering Yuri. Yuri orders Loid to apologize but continues to yell at him, leading to Yor telling him to stay out of it, which shocks the young man.
Loid then gets a call from the hospital and quickly leaves to attend to an emergency. Yuri assumes he must be cheating and convinces his sister to follow her husband. While tailing him, Yuri gives Yor stealth tips, which she remarks on his knowledge of it, which he claims to have learned from watching a cartoon with Anya. Suddenly, Yuri sees the SSS Lieutenant signaling for an emergency summons. Yuri quickly makes an excuse before rushing off, leaving Yor to follow Loid on her own. Yuri and the Lieutenant attend the emergency summons where the Boss tells them to secure their mole in WISE carrying top secret documents from the West and ensure that the pursuing WISE does not interfere.
To meet with the mole Winston Wheeler, Yuri and his division arrive at Shellbury's train station, dressed incognito. One of the agents wonders why they are disguised in their home country, to which another speculates that the current administration does not want to do anything to risk their relationship with Westalis, in particular, the theft of their secret files. Regardless, the SSS Lieutenant tells them not to draw attention to themselves and adds that this would be the most opportune moment to catch Twilight if he shows.
Yuri idles at the storefront of a bookstore while looking out for any agents on the street. Loid, disguised as Winston, slides up to Yuri, startling the young man. As "Winston" tells him to act normally, Yuri is surprised to have encountered the mole and that he knows he is SSS. After Yuri confirms that he is speaking with the real Winston by checking his appearance and dress, he nods to his Captain. "Winston" tells Yuri that the hotel has "a serious rat problem" and says he is changing the location, ordering to meet at a park in thirty minutes.
Yuri and the Lieutenant get word that the Winston they met was actually Twilight in disguise and are ordered to search the park for him. Yuri spots his footprint on the ground, even though this is his first time in the area. Yuri believes Twilight is beginning to panic by leaving a track and deduces that he may have gone down in the sewers. Yuri descends below to give chase while the Lieutenant sends backup to guard the sewer exits.
As he searches the sewers, he is attacked from behind a corner by a metal pipe. The attacker aims a gun at Yuri but wavers, and Yuri is shocked to see that the attacker is Twilight, who is impersonating him. While Yuri is shocked by this reveal, he and Twilight draw their guns and shoot at each other. Yuri is able to shoot Twilight's arm as he shoots Yuri's gun away. Yuri kicks Twilight's gun from him, and the two men quickly jump to create some distance.
Yuri is shocked to be directly witnessing Twilight's abilities for the first time. He pauses to wonder why Twilight chose to imitate him and suspects that he could be someone close to him or someone who has been observing him. Yuri brushes those thoughts aside to focus on arresting Twilight, and the two begin to fight. Twilight quickly knocks Yuri to the ground. Yuri gets up and orders him to surrender, saying that the sewer is surrounded, but Twilight tells Yuri to leave if he does not want to die.
Yuri rushes at Twilight, who removes his belt and strikes the officer's jaw, once again knocking him to the ground, but he gets up again. The two resume their brawl, trading blow after blow. Each time Twilight knocks Yuri down to the ground, Yuri keeps getting back up. Twilight decides to end the battle by bashing Yuri's head with a pipe. A bloody Yuri gets back up but falls shortly after, muttering an apology to Yor as he loses consciousness.
About fifteen minutes later, Yuri is woken up by his teammate, Chloe, and the Lieutenant. Still delirious, Yuri mistakes Chloe for Yor and goes in for a hug, but she chops at his head in a flustered manner. Knowing Yuri was defeated by Twilight, the Lieutenant has Chloe bring Yuri back for medical treatment while he pursues Twilight himself. On their way out, Yuri wonders why he was not killed by Twilight but cannot put his finger on what that would suggest. Yuri declares to go after Twilight when he gets out of the sewers, but Chloe says that, with his injuries, he will only get in the way. Afterward, Chloe helps pull Yuri to the surface.
Ultimately, the SSS agents fail to retrieve Wheeler and the files or capture Twilight. Returning to Berlint, Yuri skips filing his report and heads straight to the Forger residence to see Yor. Yuri is surprised to learn that Loid is also injured, with Loid explaining that he had an incident with a pro wrestler at work. As Loid goes to make tea, Yuri notices that Loid's right arm might be injured, the same arm that he shot Twilight. Remembering his theory that Twilight could be close to him after transforming into his double, Yuri begins to suspect Loid is Twilight and forcefully lifts his sleeve to check for any wounds, only to find nothing. Yor asks what Yuri is doing, and he claims to be looking out for Loid's safety. Yuri backs off from his suspicions, reminding himself that Twilight has copied people not close to Loid. Yor hurries Yuri away to let Loid rest, and a sad Yuri decides to get back to work.
Since his last meeting with Yor and after not seeing her in a while, Yuri is in a daze, contemplating if he can really protect his country. While not paying attention to the road, Yuri is struck by a truck while heading to work. Despite the injury, Yuri heads to the SSS headquarters as normal, where he talks to the Lieutenant about his problems. Despite rising to be a successful man, Yuri is also frustrated with his losses to Twilight, especially with his most recent one. The Lieutenant assures the young man that even though the Wheeler mission ended in a draw, Yuri did well to injure Twilight, whose injuries have been made aware of and is actively being searched by the entire SSS.
Chloe arrives with a potential Twilight suspect, but the man she has is a short and plump one. While it is not the man they are looking for, the Lieutenant has Yuri and Chloe interrogate him anyway. After reviewing the background of their suspect, Bobby Bockle, Yuri talks down to him and demands information on his organization, the Chicken Circle group. When Bobby refuses to answer, Yuri threatens him with torture. After Bobby reveals the Circle's headquarters, Yuri and Chloe head out to investigate it.
On the drive there, Chloe asks Yuri about his recent mood, knowing he is taking his frustrations out on their suspects. While they talk about Yuri's behavior back in their college days, Yuri suddenly hides himself in the car, having sensed Yor nearby, which creeps out Chloe. As they drive past a crosswalk, Yor is there, ready for her lunch break. Chloe suggests that Yuri could have made something up if she had seen him, but he points out her presence, to which she suggests pretending to be lovers. Yuri refuses the idea, saying he could never do that to the woman who set aside her own happiness for him. Chloe is confused and says that if she were Yor, she would want him to find happiness.
Upon arriving at the Chicken Circle's base, Yuri charges in alone before Chloe can attempt a reconnaissance trip, wanting to affirm his strength. Inside, Yuri fights all the group members, using fighting moves with "Yor" prefixed to them. Yuri gets injured during the scuffle, and while he stops to breathe, he wonders what more he can do to be stronger. Behind him, a member charges at him with a knife, but Chloe stops Yuri's would-be attacker. Chloe slaps Yuri for his recklessness, and when he says he could have taken that knife stab, she slaps him again, reminding him that even people like him can die.
She asks Yuri how Yor would feel if he were to die and points out how everything he says he does is all for her, calling him a self-serving hypocrite. Chloe expresses admiration for Yuri's fortitude, but says it leaves him blind to too many things. Yuri apologizes, and Chloe does the same, realizing she went a little overboard with him. Chloe tells Yuri that the way Yor supported Yuri might seem normal to him due to their time together, but she says there are other ways people can support each other and instructs him to take better care of himself and be able to prove it to Yor. Remembering the time when he got sick as a kid, Yuri recalls Yor promising to get faster for his sake. This inspires Yuri to improve his defensive skills in evading and blocking, which baffles Chloe. 
Yuri returns to his apartment to train when he gets a surprise visit from Yor. Yor reveals that she wanted to see him again and apologize for kicking him out last time when he was also hurt. For her apology, Yor brings Yuri some home cooking. While Yuri enjoys the food, Yor reveals that the fish he likes was made by Loid, causing Yuri to spit it out. Cursing Loid in his thoughts, Yuri wishes he were Twilight and wonders if he could find a reason to have him arrested and executed, believing Yor would not be sad about that. Yuri asks Yor about the time she said she was dissatisfied with Loid, to which Yor says it was a misunderstanding. When Yuri asks if she loves him, Yor stammers in response, and he concludes that she hates him.
=== Term Finals Arc ===
As Anya is studying for her term finals, Loid is struggling to make good progress. He contemplates calling Yuri over to tutor her again but decides against it, as he has already aroused Yuri's suspicions and sees it best to avoid needless interactions with him, not to mention Loid's dislike of how loud he is.
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