Post a character (if u know of any) who has obsessive compulsive disorder অথবা O.C.D. for short

This is from TV Tropes; I've never seen any of these shows.

*Death Kid from Soul Eater.
*Mikami & Light from Death Note.
*Black from Pokemon Special.
*Chiri from Sayonara, Zetsubou-Sensei.
*Eiichiro from Baby Steps.
*Re-l from Ergo Proxy.
*Levi from Attack on Titan.
*The contractors in Darker then Black.
*The South Birds from One Piece.