Keisuke is a fair-skinned teenage boy messy dark hair, he also has bags under his eyes that might be because of staying up late, watching Dog Play's performances. He is usually seen wearing Dog's Play merchandise.
"An epitome of trashiness", according to Kaname Asagiri. He is quite naive, lazy and aggressive. He's naive because he wants to be friends with Kaname even when there were signs of him showing his true nature, like when Kaname almost called him an "Otaku F*ggot". He is quite lazy since he does not bother to work hard to pay back his debts with loan sharks, he was shown to be aggressive when someone interrupted him while he was watching Dog's Play.
- He is the first person to be killed by Kaname Asagiri.
- In Chapter 66, it seems that he and Sakura Sakaki seem to know each other.
- Strangely in the manga, he tries to befriend Kaname Asagiri. While in the anime, he just feels anger due to the fact that he thinks Kaname corrupted his angel Nijimi Anazawa.
- His voice actor also voices the leader of the Administrators Ichi.
- His birthday is on August 12th.
- Along with Kichiro Misumi, Keisuke's horoscope is Leo.