Nyamero is Mio Fuyutsuki's pet cat. Fuyutsuki adopted him at some point, and he's been with her ever since—including when she moved to her current apartment. Like most cats, Nyamero spends his days lounging around the place, occasionally getting up to play or eat. Fuyutsuki once bought him a fancy new toy, but true to cat form, he was way more into the bag it came in.
Content compiled by AnimeList.moe from publicly available sources.
