Katabutsu (カタブツ?) is a recurring character from Majisuka Gakuen 4 to Cabasuka Gakuen. She is one of Miyawaki Sakura's classmates. In Majisuka Gakuen Stage: Lost in the Supermarket, she became a part-timer in Black's Supermarket and was the former Rappapa Queen's apprentice. In Cabasuka Gakuen, she helped Miyawaki Sakura in her mission to open Club Suizokukan to help raise funds to pay for Majisuka Jyogakuen's debt. Her family name was revealed to be Okada (おかだ?) when she received her Genji Name: Karei (カレイ flounder?) from Kagetora Saionji, while her given name was revealed to be Nana (なな?) when she secretly gave it to one of her frequent customers that she has grown fond of.
- Okada Nana, Katabutsu's actress, earned the title King of Majime in AKBingo! for her serious personality. Both katabutsu and majime mean "serious".