Chaos Head Girls Part 2 :
Yua is a third-year student at Suimei Academy who seems to be stalking Takumi but later seemingly befriends him. She seems to be quite into anime and manga. However, this is all later shown to be an act where she is investigating him as she suspects Takumi of being the criminal behind New Gen.
Sena is a third-year student at Suimei Academy. Takumi first encounters her in a hallway at school but quickly excuses himself after facing her ominous glare. She is often seen standing around Shibuya holding a very long sword and eating a light blue ice pop. Voiced by: Hitomi Nabatame
Kozue is a second-year student that transfers into Suimei Academy early on in the story. She is not shown to be speaking but appears to have telepathic abilities. Kozue is in the same class as Takumi and appears to know him as she spoke to him through his mind when she walked past him on her first day at school. Like Sena, she has a Di Sword. She calls herself Kozupii. Voiced by: Ayumi Tsuji