Cabaret Club Aquarium (キャバクラ水族館 Kabakura Suizokukan?) is a Cabaret Club opened by Miyawaki Sakura to raise funds for Majisuka Jyogakuen after the school's funding company went bankrupt.
- Miyawaki Sakura/Same - primary business owner (by concept), cabaret club girl
- Kagetora Saionji - legendary cabaret club producer, registered business co-owner
- Satoshi - Suizokukan's Tsukemawashi Level Courtesan
- Center/Kurage - Cabaret Club Girls mentor
Cabaret Club Girls
- Regular Girls
- Guest Help Girls
- Unnamed Club Help Girls
- Miyazaki Miho
- Mogi Shinobu
- Omori Miyu
- Sasaki Yukari
- Scandal - an idol with a dark past, rescued Jisedai from Dandy Magnum.
- Salt - a detective, Majijo's former Rappapa president.