Rottytops is a family member in a Zombie Clan. Rotty travels the land by caravan, gaining worldly skills and threatening to eat peoples' brains. She has two nasty brothers (Abner Cadaver and Poe) that seem capable of bringing out the worst in her whenever they're all together. Rotty is obsessed with Shantae and the challenge of corrupting her pure nature.
Even among zombies, Rottytops and her brothers are considered bad news, but Rottytops genuinely cares for Shantae. Her true feelings for Shantae are revealed through her former identity when Shantae visits the village of lost souls in The Pirate's Curse.

Her voice can be heard here at 1:02: https://youtu.be/4K0yRFypfjo