Kuchiki, Manabu

朽木学

Introduced in volume two of the manga, Kuchiki becomes a full member of Genshiken alongside Ogiue in volume four, apparently after being expelled from the Anime Club. Kuchiki is a very abrasive individual, characterized by a loud and obnoxious speaking style and a lack of hesitation regarding indecent or improper actions (such as spying on girls). He was previously a member of the Anime Society before joining Genshiken. He desires the nickname Kuchi (Kucchī) and takes pleasure when others use it. He is also unashamed to engage in cosplay.
Kuchiki is actually the second-best fighting game player in Genshiken, trailing only Kousaka. He twice anticipates being named the next Genshiken president, only to be passed over in favor of Ohno and subsequently Ogiue. Primarily a background comedic character, Kuchiki serves as a catalyst for many of Genshiken's slapstick and off-color jokes. One might even consider him the boke to the rest of Genshiken's tsukkomi.
In the manga's relaunch, it is revealed that Kuchiki does not need to search for employment, as he is virtually guaranteed a position at a local bank due to family connections.