Kuchiki Manabu, also known as Kuchii (クッチー Kucchī), is a loud, skinny and tall male otaku character from Genshiken with short black hair who loves karaoke, video games, cosplay and anime.
While he is sometimes disliked by the rest of Genshiken (especially by the girls), Kuchiki is actually good hearted and has been very helpful in more than one occasion.
Kuchiki is the classic cute-fixation otaku: he calls other female members with the -chin suffix, his movements and behavior copy those of many popular anime and most of the time he speaks imitating the voices of popular characters.