Also known as: はんぺん, はんぺん(ニジガク), Fishpuff
A white stray cat that hangs around Nijigasaki Academy. Mostly taken care of by Miyashita Ai and Tennoji Rina.
Localized as Fishpuff in the English version, the rough literal translation of name.
It suddenly got a Personification in Hangyaku No Nijigasaki ch. 48 (post #9072500), transformed by the God Of School Idols into a Cat Girl.