Divinos/Relationships

## **Black Crown**

### **Zane Euphoria**

Having met him after he was nearly killed by Vahn, Byakuya was interested in Zane due to his conflicting thoughts about dying. Reincarnating him as a devil, Byakuya even berated Amber for not having left school to take care of Vahn and not having detected him sooner. After meeting for the second time, Byakuya realizes that he's the host of the First Axis, leading him to become even more interested in his potential as a mage. In Book 2, Zane asks Byakuya if he wants to join Black Crown; no interested at the moment, he denies the offer. After seeing his resolve in the Royal Blood Tournament against Felix, however, he agrees to join the guild.

In Book 3, the two do not meet, but Byakuya tells Afeus Clover that he chose to end the God-Slayer's plans because of a promise he made, referencing the one he made to Zane and the rest of Black Crown. When asked by Amber in Book 4 what he thinks of Byakuya, Zane tells her that he isn't sure, though he does know that he wishes he would be a bit more friendly. In Book 5, Zane asks to spar with Byakuya, ending in a quick and brutal defeat, leading the ladder to tell him that he respects his wish to get stronger and that he hopes he succeeds. Throughout the series, the two are noted as having a vague relationship, with Amber stating the two would probably be friends if they hung around each other more. At the end of the series, Zane chooses Byakuya to become captain of the guild in his and Amber's place. Speaking about his journey, Byakuya tells Zane that he didn't end up passing him in physical strength, but that he had surpassed him as a person.

### **Amber Lucifer**

The two first met as children shortly after Amber's return from Earth where she met Zane. Their fathers being brothers, the two of them recognized each other as cousins, but did not have a particularly good relationship. After getting into a fight with her, Byakuya ran away to Draco and met the Storm Dragon-Queen Katalysta.

Following Draco's destruction, Byakuya met Amber once again in Annabel after he defeated Spencer McCarthy. Gaining the attention of Lucifer, Amber's father, Byakuya convinced him to let Amber restore the guild known as Black Crown. Because of that sentiment, Amber offered Byakuya a position in the guild, not realizing who he was at the time. Byakuya proceeded to berate Amber, calling her miserable and weak, which confused her and eventually pushed her to move to Earth.

A few months later, the two met again, with Byakuya introducing Amber to Kristina. There, Byakuya once again criticized Amber, but did not tell her about his identity and what had happened in Draco. In Book 1, Amber is shown to have a heavy dislike towards Byakuya, explaining to Zane that she has no idea why he hates her so much. In Book 2, after learning about his identity and his past, Amber begins to sympathize with him, offering him once again a position in the guild; while he accepts, he only does so after Zane asks him to following the end of the Royal Blood Tournament. In Book 3, Byakuya defeats Afeus Clover, telling the God-Slayer he had made a promise to Amber and the rest of Black Crown he would show up when they need him.

In the subsequent books, the two are shown to have a more natural opinion of each other. At the end of the story, Byakuya refuses to apologize to her, but says that she proved him wrong, and that he would follow in her footsteps if he needed to.

### **Kristina Kaye**

Having met each other when Byakuya was disguised as a human, the two were friendly with each other due to their mutual experience of family trauma. Returning the next day, Byakuya ended up finding her severely injured by a rampaging beast, quickly reincarnating her. Afterwards, Byakuya forced Amber into accepting Kristina into Black Crown, to which she agreed.

In Book 1, after Zane learns of Kristina's past, he begins to suspect her relationship with Byakuya, especially after seeing the two interact with each other prior to Byakuya's fight with Felix. During the war between the Underworld and the Alliance, Byakuya shows up to help her and Zane against the angels who showed up to provide back-up for Jay. Stating he had no particular reason for arriving, Zane could tell Byakuya was lying.

In Book 2, Zane becomes even more suspicious when Kristina begins to hang around Marc Castellan, another boy at the school. Not sure of what to think of the situation, Zane tells Amber that he wonders what Byakuya would think about it. Amber states that Kristina knows what she's doing, and that Byakuya should think against hurting her for his own sake. During the Annual Mage Tournament, Amber begs Byakuya to enter the tournament as a wild card to fight Spencer McCarthy; however, he only agrees after being asked by Kristina. In Book 3, Byakuya reinforces the promise he made at the end of Book 2 to Kristina; at the end of the book, he fulfills it by showing up to face off against Afeus Clover, who is quickly overwhelmed and ends up conceding. In Book 4, Amber mentions how Byakuya treats Kristina way better than her, calling it blatant discrimination. In response, Byakuya states "You're not worth discriminating against. You're just weak." Confused at his thought process, Zane explains that Kristina trains every day with her magic and weapons, only worsening Amber's confusion as she states that she trains every day too. In Book 5, Byakuya reveals that he was Marc in front of Zane, causing the ladder to realize that Kristina had gotten close to Marc because she knew that he was Byakuya in disguise.

In Book 7, Zane asks Byakuya about his relationship with Kristina. Confused as to why he was asking, Zane states that they seem to be in a similar situation to how him and Amber were. Unsure of how to reply, Byakuya tells him not to worry about it, leading Zane to realize that the Dragon-Slayer was unsure of his own feelings. Following the descent of the Chains of Heaven, Byakuya protects Kristina and even intercepts the fight between Gelida and Leonais for her safety. At the end of the book, Byakuya vaguely confesses his feelings to her, leading to the two to become embarrassed. In Book 8 and 9, the two are shown to be closer to each other, with Kristina even getting Byakuya to hang around without his cape or bandana. At the end of Book 10, Kristina blushes when asked about Clara on her relationship with Byakuya, saying that she isn't sure yet.

### **Mio Tsukomi**

Impressed by his power, Mio asked Byakuya if he could train with her sometime. Ignoring her, Mio was offended at his rudeness, but was nonetheless impressed when he handily defeated Spencer McCarthy. In Book 3, Mio tells Byakuya that he needs to be more social, and that even Zane hangs around the guild more than he does. Speaking to her for the first time, Byakuya tells her to mind her own business, only irritating her even further. After meeting his sister, Hazel, and learning more about his past, Mio became interested in learning more about his power. When off-guard, Mio decides to attack Byakuya at full power using her Dragon-Slaying Magic; quickly reacting, Byakuya is easily able to destroy the incoming magic, but does not fight back. Insulted at the fact that he had flicked away her attack and continued to ignore her, Mio began to become increasingly irritated with him. In Book 5, after learning from Joker about how Byakuya had killed the archangel Gabriel, she began to fear him and what he was capable of. In Book 6, after Byakuya defeated Jack-O'-Hollow with ease, Mio stated that she had no idea the power of the Seven Dragon-Kings could reach such heights. In Book 7, Mio confronts Byakuya again, telling him that he should be honest with himself. Byakuya ignores her again, and latter tells her "In terms of strength I could crush you like a bug, so don't bother me with that nonsense." Instead of becoming irritated, however, Mio became motivated to increase her strength. In Book 8, she thanks Byakuya for being harsh with her, as she finally realized his ideology. Byakuya tells her that she has good control over her magic, but that she still has a long way to go if she wants to be at his level. By the end of the series, the two are friendly with each other.

### **Mayuri**

After joining the guild, Byakuya insults Mayuri by pointing out that she isn't real and that she's just an AI, which hurts her feelings and causes her to shutdown for some time until Mio convincers her to power on again. Whenever he is present, Mayuri is often quieter than usual and speaks in a low tone of voice, indicating that she feels threatened by him.

### **Kieron Bernard**

When asked to support Mio, Jay and Kieron by Amber, Byakuya referred to Kieron as "the funny one" and said that they would be fine on their own. In Book 3, Mayuri claims she can't quite calculate how strong Byakuya is, to which Kieron says that he reminds him of a lot of different manga characters. While the two don't speak much, they generally find each other amusing.

## **SZ-Class Mages**

### **Spencer McCarthy**

Following the destruction of Draco, Byakuya decided to head to the capital where he encounter Spencer near Lucifer Manor. Aggravating one another, the two got into a fight that Byakuya managed to win with medium difficulty, leading Lucifer to prompt Byakuya to SZ-Class. Due to being humiliated, Spencer grew to hate Byakuya, starting his training again so that he could try to surpass him in strength. During the Annual Mage Tournament, Spencer attempted to eliminate Byakuya, not hesitating to show his full power; however, he was defeated once again, stating to the public that he hated him and that he was an outcast. Later, Byakuya stated that he didn't think much of Spencer, and that he only saw him as an annoyance. The two are considered to be rivals.

### **Umbra Geass**

Having been called to Lucifer Manor for the SZ Conference, Umbra was the first to tell Lisa and Felix how ridiculous their plan was. When Byakuya showed up, the two showed mutual respect for each other by exchanging glances. Having never given up his training, Umbra was stated to be someone that Byakuya respects for his strength and willingness to continue to grow. In return, Umbra said he was impressed by Byakuya's power and ideology.

### **Alzon Viernes / Jack-O'-Hollow**

While Alzon was considered by the public and by the government to be the strongest SZ-Class Mage and the strongest devil alive, Byakuya was shown to be more powerful on several occasions. Following Mayuri's analysis at Lisa's order, Kaguya stated that they were underestimating Byakuya's power as he was the best mage in the Underworld at concealing their strength. During the battle between the Underworld and the Alliance, Byakuya easily stomps Hollow on his rampage, and in Book 6 he is shown to be far stronger than the Fire God-Slayer's alter ego. While Alzon himself never met Byakuya, he stated that he was confident the Dragon-Slayer could stop him if he went on a rampage.

### **Kaguya Hoshimiya**

Though they're never shown to have spoken to one another, it's hinted that they have mutual respect for each other. During the conference to discuss how to handle Vahn, Kaguya was highly against Lisa and Felix's plan, and stated they had no idea what they were up again. In Book 3, Byakuya called Kaguya the "mysterious lady" and said that she was quite powerful.

### **Xvetal Morgan**

In Book 1, it's stated by Xvetal that he has fought Byakuya several times and that the battles were close. In Book 2, Byakuya confirms that to be true and claims that Xvetal is the strongest mage he's ever fought, and that he is stronger than all of the other SZ-Class devils.

## **Devils**

### **Hailey Luna**

Having accidentally killed her and being the one who killed Gabriel, Byakuya was the main reason for her mixed reincarnation with the archangel. As a result, Hailey said she was unsure of how she felt about Byakuya; meanwhile, Byakuya told the reincarnated girl to stay in her lane or else he would end her life again. When asked by Amber on why he was so harsh to her, Byakuya said that that the weak don't deserve a second chance to live, and that because she was technically Gabriel that he would kill her if he had the chance.

### **Clara Lucifer**

In Book 2, after Byakuya momentarily shows his power and walks past her, Clara is shown to have an odd look on her face. When questioned by Zane, Amber stated that Clara had an admiration for powerful mages, and that she probably looked up to Byakuya. In Book 6, Byakuya states that Clara's drive for power is admirable, and at the end of the series he's impressed that she's willing to challenge him.