Towa claims it serves as a guardian to watch over her in this world. It doesn't seem to be particularly expressive, with its face perpetually stuck in a state of 0w0. Bibi seems to be both the name of the character and the name of the species, and they can take the form of a hat, as well as a four-legged bean-shaped creature with multicolored neon claws and a demon tail. Alongside Towa herself, Bibi's character design can be credited to rurudo.
Pixiv
Twitter
Bluesky
Weibo
Lofter
Tumblr
