Shiro-chan

Shiro-chan (シロちゃん) is one of the three cats the Kawamoto family primarily care for. Shiro-chan is the white cat of the trio.

Although in the story, all three cats are referred to generically in a group (typically as "kitties", or nyaa-tachi), they have been given individual names by Chica Umino outside of the story. For example, Umino shows a picture of Mike-chan and Shiro-chan hoodies in this tweet. Additionally, in this tweet, Umino shows a picture of a Shiro-chan plushie put to bed.