Pushi is a female cat that Anpu took a liking to. Anpu asked Sai a favor to make her fall for him. Instead, Anpu was mistaken for a pervert and to make it worse she instead fell for Sai, the cat version of Kusuo. Pushi and Anpu now stay in front of Saiki's house. She waits for Sai to come around, while Anpu wants to fight Sai.
Pushi's name is from the word Psi (プシー, Pushii).
Pushi's character profile was found in the character guidebook.
The netflix english subtitles show "Pussy" instead of "Pushi".