Introduced in volume two of the manga, Kuchiki becomes a full member of Genshiken along with Ogiue in volume four, apparently after being kicked out of the Anime Club. Kuchiki is an abrasive individual with a loud and obnoxious speech style, and he has no qualms about doing indecent or improper things, such as spying on girls. He was part of the Anime Society before joining Genshiken. He prefers to be nicknamed Kuchi (クッチー Kucchī) and enjoys it when people use this nickname. He is also unashamed to cosplay.
Kuchiki is actually the second-best fighting game player in Genshiken, next to Kousaka. He expects to be named the next Genshiken president twice, only to be passed over by Ohno and then Ogiue. Mostly serving as a background comedic character, Kuchiki is often used for slapstick and off-color jokes in Genshiken. One might even consider him the boke to the rest of Genshiken's tsukkomi.
In the relaunch of the manga, it is revealed that Kuchiki doesn't need to look for a job since he is guaranteed a position at a local bank thanks to family connections.
