Kagi then dies to his cancer in front of Yamoto. She half-hardheartedly fights him, then cries as she could not seriously fight and try to kill her sensei. She fights and kills Third Eye and appears before Silver Karasu, and recognizes him as Kagi right away. The Soukaiya sends their ninja soul tracker, Third Eye, and mercenary Sword Dancer to kill Yamoto, along with ordering Kagi to kill her too. She then comes under protection of Kagi as he teaches her karate. She then gets attacked by Nutcracker and is saved when Kagi stabs him, killing him. Surprised by seeing a teenage girl in such place so late in the night, he tries to start a conversation and then goes out, leaving Yamoto alone. She then jumps away.ĭays later, Yamoto meets Kagi Tanaka at a laundromat. Seven days after this, Yamoto goes to Asari's window, apologizing for getting her in bad situations and says sayonara, and that she'll be there if Asari ever needs her help. Even though Ninja Slayer's soul, Naraku Ninja, insists on killing Yamoto, Ninja Slayer refuses, letting her escape. After Ninja Slayer fights with Sonic Boom for a while, Yamoto delivers the final blow on Sonic Boom with a large origami attack, which kills him. Sonic Boom also seems to be too much for her as he overpowers her, however she is saved by Ninja Slayer. Sonic Boom proves too much for Shogo and soon after begins to fight Yamoto. While she is at a karaoke with her friends, Shogo gets her attention and apologizes for what he had done to her, and attempts to hold back Sonic Boom so she could escape with her friends. The Soukai Syndicate, aware of Yamoto's ninja soul, orders the newly added member Shogo, who was renamed Suicide by Sonic Boom, to kill her. Yamoto's new found strength makes people no longer bother her in school. During the fight, Yamoto takes pleasure in hurting the people and at first states that wasn't her own thoughts, but quickly realizes these were her thoughts at the time.
Yamoto then uses Shi Ninja's power to defeat her attackers and save Asari. Some time later, Yamoto and her friend, Asari, are attacked, and as Yamoto is being choked, Shi Ninja calls out to her. Yamoto using her origami weapons during her fight with Sonic Boom. At the brink of death, Shi Ninja had entered her body and kept her alive. Sometime in the past, another student, Shogo Maguchi, attempted to commit suicide by jumping on the school roof and landed on Yamoto. She was said to have killed her parents by Sonic Boom. The history's timeline is shown in order of events, not order of release.
However, she sometimes breaks free and use "私, Watashi", which is what most Japanese girls use. Yamoto also speaks using the first person pronoun "アタイ Atai, Me is " which is done to show Shi Ninja's influence on her. She is shown to turn violent when using Shi Ninja's power and finds enjoyment in it, however, she has since gained better control over it. Yamoto a reserved girl and is shown to care deeply for her friends and against joining the Soukai Syndicate. In the past, Yamoto is shown to have longer hair. When using Shi Ninja's power, her eyes turn purple and a ghost-like purple scarf forms on her. She wears a Japanese school sailor uniform that's white and black. Yamoto has short black hair and blue eyes. 3.1.5 Neo-Saitama in Flames (anime only cameo).