Posie Lion

Posie Lion is a 5-year-old lioness who is Chicago's little sister. She is never seen on the show because she is either at daycare or at Nanny's so Daddy can work on fixing computers. Posie was seen in a hand-drawn cartoon short Chicago made where she was voiced by Freida.

Posie likes unicorns and bothering Chicago, but he's okay with her doing that.

She was 2 when the show started.