Blanca

Blanca is Vanilla's magical familiar. She is a mouse and hates being called a rat. She is extremely helpful to Vanilla and giving her advice on how Vanilla can get more hearts. She loves Vanilla and hates Chocolat openly and often laughs at Chocolat's plans. She says "-chu" at the end of her words which is mouse-like in Japanese.

In the manga

[Spoiler] she ran a salon in the Magical World, but was turned into a familiar when she fell in love with a human and lost her heart. She is turned back into her original form with the power of Pierre's (now white) heart. [/Spoiler]

Her real name in English is Libbie/Libby and Blanca is Spanish for white (feminine form of blanco).