Ai is a Tibetan fox, so the muscles of her face are not developed enough to show expressions, leaving her with an expressionless face. Ai has a short, light coat, along with large eyes and pupils. During her treatment in the clinic, Ai wore a simple hospital gown, and during her last night with Gohin she wore a dress with shoulder pads and an accessory on her left ear.
Despite her expressionless face, Ai was mentally unstable. With Gohin's therapy, she regained her rationality and sense of humor, and also began to feel guilty for her crime.