Berbil Belle is a female member of the Berbils. She wears a yellow colored flower in front of her left ear. This makes her easy to distinguish from the rest of the Berbils who all look exactly alike.
Berbil Belle is the one who first tells the ThunderCats about Mumm-Ra, his evil ways, and how anyone who speaks his name gets hit by a lightning bolt. Despite being struck by lightning for saying Mumm-Ra's name, she continues to do so.