Tatami is an average-sized teenager girl, with blonde hair that is oddly spiky behind her ears and bangs that lie over the right side of her face. She also wears blue fish-shaped earrings and has sharp teeth.
Telescopic: Tatami is able to retract her own body parts into herself, similar to a turtle.
- Naka "中" means "inside", game "瓶" means "bottle" could be used as a homonym for kame meaning turtle. tatami "畳" means "folding up".
- Tatami was called a "fangirl" by Itejiro Toteki. This may mean that she is a fangirl, or he was just speculating based on her actions.