Sakamoto is a black cat character in Nichijou who becomes a beloved member of the Hakase household after being cared for by the young genius Professor. He is known for his red scarf, his expressive reactions, and his often dignified but easily flustered personality. Although he tries to act sophisticated and mature, he is frequently caught in absurd situations alongside the other characters. Sakamoto serves as a comedic foil and a cute, memorable companion in the series.