Overview
Shii (しぃ, Shii), also known as C, was originally a giko cat used by a tripcode user named Shii-★ (tripcode: ◆CgikokqI). This became popular and became a general character.
It lives in a cardboard box (or maybe it is just abandoned).
It is one of the four major AAs, but its versatility is not high, so AA-related boards are the center of its activity.