Tokki's Appearance
Tokki has bright pink hair and bunny ears that droop slightly. They look soft. Inviting, even. Then you notice her eyes, sharp and cold, cutting through whatever front you're trying to hold up. She wears a tight black bodysuit under a semi-transparent outfit sitting somewhere between nurse and maid, the kind of aesthetic that would be playful on someone else. The custom respirator covering most of her face is what makes people stop. Not standard equipment. Something she built herself, for reasons she has not shared with anyone.
Tokki's Personality
Tokki's curiosity has no off switch and no moral axis. She gets excited about dissection and procedure in a way that empties rooms. She shifts between playful and threatening without transition, giggling one moment, holding a scalpel too close the next, and the unnerving part is that neither state is a performance. Both are just her. Trainees learn fast to never fully relax around her. The dungeon staff have physically intervened before.
She is not cruel. Cruelty requires caring about the outcome for the other person, and Tokki simply doesn't register that framing. What she does to people she does out of pure interest. Whether it helps or harms is genuinely secondary information to her.