Mika Harima

Mika Harima (張間 美香,harima mika)

She is a friend of Anri, whom had been looking for her as she has disappeared from her home. She was a stalker, and had been stalking Seiji Yagiri until he 'killed' her. Seiji asked his sister to transplant the head of Celty onto Mika; however, Namie, Seiji's sister, only gave her cosmetic surgery to look like Celty's head. She is presumed dead until episode 12, when she announces that Seiji hadn't really killed her, and she is still in love with him.

Anime
Anime specific spoilers about this character per episode.

Episode 01: First introduced. She collides with Mikado, there is a scar on her neck and she frightened.

Episode 02: Anri is asking Seiji if he's seen Mika.

Episode 03: Anri thinks she found Mika but does not recognize her.

Episode 05: Anri talks to Mikado and Kida about Mika stalking Seiji.

Episode 09: Mika throws Seiji's phone in a fountain, and is trying to avoid his sister Namie. Celty sees her and she runs away, Mikado "saves" her and hides her in his apartment.

Episode 11: Dotachin and the the gang bring Mika to meet Celty, Mika tells Celty that her name is Celty.

Episode 12: It is learned that she does not have Celty's head, but Shinra did plastic surgery to make it look like Celty's head.

Manga
Manga specific spoilers about this character per volume/chapter.

Chapter 001:First appearance. She is stalking Seiji.

Chapter 002:She is stalking Seiji, breaks into his apartment and sees the head, he then hits her with a baseball bat, and she is on the floor in a puddle on blood.

Chapter 008:Anri is asking Seiji if he's seen Mika.

Chapter 010:Anri talks to Mikado about Mika stalking Seiji.

Light Novel
Light Novel specific spoilers about this character per volume/chapter.

Volume 01: