Kuromi (クロミ) is My Melody's rival, who is a white rabbit or imp-like creature wearing a black jester's hat with a pink skull on the front and a black devil's tail. 

The skull's facial expression changes to match Kuromi's mood.

Birthday: October 31st (Halloween), 2005

Her name translates from Japanese to English as "chrome." 

Kuromi has become a popular character in the punk, scene, and goth crowds due to her appearance.