A black cat sporting a red scarf made by the Professor—the whole thing basically lets him talk. Sakamoto's got this thing where he insists on being called "Sakamoto-san" because, technically speaking, he's older than both Nano and the Professor if you do the whole cat-years-to-human-years conversion. So yeah, he's pretty condescending about it. That said, he's still a cat at heart, which means his dignified act doesn't always stick. He'll slip into typical cat behavior without even noticing, which kind of ruins the whole superiority complex he's got going on.
Content compiled by AnimeList.moe from publicly available sources.
