Leo Teich

== Leo Teich (Earth 089A) ==
=== Status ===
Deceased
Killed by Leo Teich
Leo is a member of Fireteam Zero, being number 05.
Leo Teich was born on Earth 089A and at a young age trained under a former Water Hashira Sakonji Urokodaki. With a troubled past and a passion to get revenge and cure his sister, he trained day after night for a long time until being good enough to leave for The Final Selection.
He used Cursed Gear, his was a Black Demon Series katana, holding a contract with Asuramaru. Up until a mission to hunt a group of vampires, causing his sword to break. Giving Asuramaru a choice, he asked if she wanted to rest for a while after they've fought to hard together. After a while of talking to one another, Leo and Asuramaru come to the joint decision to allow her to be free. 
=== Race ===
Human (Formerly) - Leo was a human up until he was 16.
Demon (Formerly) - After ingesting Muzan's blood, Leo becomes part Demon.
Namanari 
=== The Republic ===
Eventually fate decides that Leo Teich and his sister were bound to join Fireteam Zero owned by The UNSC in The Republic, bringing The Demon Slayer Corps into The Republic as an established section of the foundation. 
=== Family ===
Despite everyone except from Nezuko being dead in Leo's family, two Hashira became extremely fond of the duo and began looking after them in their own ways. Tengen Uzui took a liking to Leo due to his "flashy" appearance and "flamboyant" personality, (which Leo disagrees with) and began to train him in some forms of his swordsmanship. Shinobu Kocho on a completely different note, took a liking to Leo's charm, although acting unbothered all the time, he has a softer caring side that slips out every now and again. Shinobu is the closest thing to a mother that Leo has ever had, and Tengen also acts as a father figure for him too. 
=== Fireteam Zero ===
Leo and Nezuko join Fireteam Zero, a team already consisting of 4 Jujutsu Sorcerers; Megumi Fushiguro, Yuji Itadori, Nobara Kugisaki and Lucifer Thornton. After being given the number 05 of the team, they began taking missions together and all became close over the upcoming few months.
== Arcs ==
=== Final Selection Arc ===
Leo trained along with his sister Nezuko Teich under Sakonji Urokodaki learning Water Breathing. While this was happening Leo was able to pick up Water Breathing pretty well and was decently fluent with his movements during training. Before leaving for The Final Selection to be able to officially become members of The Demon Slayer Corps, Sakonji Urokodaki carved and gifted warding masks to both Leo and Nezuko to bring them good luck.
During The Final Selection, an anomaly occurred when a stronger demon attacked, working as a duo, Nezuko and Leo were able to kill the Hand Demon. Nezuko ran towards the demon with her sword as bait and swung at the air next to demon to throw it off, Leo then using Water Breathing's Second Form: Water Wheel, slicing the demon's head straight off. 
After a few more nights of The Final Selection, both Leo and Nezuko were official Demon Slayer Corps members. Nezuko being half-demon caused trouble at first, but after discussion and debate both were accepted into the Corps.
== Powers & Abilities ==
=== Breathing Techniques ===
Sun Breathing Water Breathing Sound Breathing Insect Breathing Thunder Breathing
=== Asuramaru & Cursed Gear Abilities ===
===== Asura-Kannon Manifestation Blades =====
The weapon has enhanced manifestation abilities. The Asura-Kannon ability can summon ghostly and spiritually fiery blades that can levitate and solidly hit its marks.
== Relationships ==
=== Lucifer Thornton ===
Leo and Lucifer become close friends throughout all of their missions together and the time together that they spend on the fireteam adds to their dynamic. Lucifer is hyper and bases his actions solely off of adrenaline whereas Leo is more neutral and overtime becomes less annoyed with him.
After a while, Lucifer was told by Leo to leave with the rest of Fireteam Zero after being held prisoner by The Separatists, resulting in Leo being away from the team for 6 months. This impacted Lucifer heavily as his good friend was presumed dead.
Eventually when they next met, it wasn't as either imagined. Leo had changed appearance and had a new sword, both results of him now being part demon and training under Muzan for a while. Now being on opposite sides, they was forced to fight despite the emotional damage. After managing to subdue Leo, Lucifer and the rest of Fireteam Zero took him back to The Republic's main base, Reach.
=== Nobara Kugisaki ===
Nobara and Leo both are members of Fireteam Zero and both became good friends during the time spent together there. Usually Leo, Nobara and Lucifer tend to spend time together outside of their main missions, however Leo took a big step back when Lucifer and Nobara took interest in one another. Although despite this, they're still good friends and teammates.
During their fight with Sukuna, Nobara took critical hits from Sukuna, almost causing her her death. Leo rushed towards her, catching her, and after a short time panicking, Leo and Lucifer exchanged nods. Resulting in Leo rapidly carrying Nobara and rushing her back to Reach where she was saved just in time by Shoko using Reverse Curse Technique. After her recovery, Leo helped to train Nobara to get her back up to standards strengthening their friendship.