Seiji Yagiri

Seiji Yagiri (矢霧 誠二,Yagiri Seiji) is a classmate of Mikado's. He quits school claiming he has something more important to do with his life, and later says that his goal is to find his 'true love' and run away with her. He is actually in love with Celty's head, which he first discovered when his sister, Namie snuck him into their uncle's study to look at the head. Seiji was being stalked by Mika Harima, until she broke into his apartment and discovered Celty's head, which he stole from his sister's research lab. Seiji then tried to kill her, and had his sister transplant Celty's head onto Mika's body. However, Seiji then finds out that he hadn't killed Mika, and that she had only gotten cosmetic surgery to look like Celty's head.

Anime
Anime specific spoilers about this character per episode.

Episode 02: He enters Mikado's class late and tells the teacher that he won't be coming back for a while.

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

Volume 01:

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

Volume 01:

Volume 04 : Seiji isn't seen until the end of Volume 04 as one of several people who were invited to Shinra and Celty's hotpot party. He asks Celty if she was still looking for her head. Celty replies that, for the time being, she has put the search on hold. Seiji is disappointed but then declares that he will simply have to look for it himself.

Voice Actors

 * Japanese: Kazuma Horie
 * English: David Earnest