Canta

You first meet Canta in Ground Zero when she mistakes Id for an "flat chested girl". She is one of the six fragments of chaos. At first, you think the girl is called Canta but later on, you find that the bear is actually Canta's main body and the girl is the artifact (called Morkana). Because of this, the teddy bear is controlling the girl and can perform 'teddy bear magic' which has no casting time. This means it is hard to attack or defend.