Mimi Langlander

Marion Anne "Mimi" Langlander is Leo Zifkak's cousin and the keeper of the Key to Rondo. She has a pet dog named Mutt.

Physical appearance
Mimi has short hair. When she and Leo first enter into Rondo, she is wearing a pink jacket with kittens and bows on it, despite disliking both.

Personality
Mimi is a quiet girl. She is tired of being told what to do and how to act, and longs for the time when she is older, has become a famous violinist, and able to call herself whatever she wants.