She's a small, possum-sized, anthropomorphic, beige mouse, with a bubbly, joyful, supportive, empathetic, and rather cute innocent personality. However, she actually enjoys violence. Nezumi-chan wears an olive green, buttoned dress, and underwear beneath. Because... Yeah, why not. Also, she's really good at dropkicking people. Her garden often gets invaded by big, monstrous insects, which she wouldn't mind getting killed. In fact, she would love it if they got murdered in brutal ways.