Usagi is one of the main character in the series. Usagi is in a trio with Chiikawa and Hachiware. Usagi is known for being energetic, mischeavous and sometimes reckless. Usagi also really likes to eat. Usagi cannot speak and only uses sounds, expressions and actions to communicate with Chiikawa and Hachiware.

Just like the other characters, Usagi isn't based on a real life animal and is referred to as small and cute thing. From the looks, Usagi resembles a rabbit.