Belladonna serves as Amazon Lily's doctor, and she's best known for her practical—if somewhat harsh—methods. When Luffy washed up on the island covered in mushroom roots, she didn't hesitate to set him on fire to burn them off. She's also the one who filled Luffy in on what really happened during his arrival, revealing that Marguerite had secretly saved him while the other Kuja warriors were about to execute him.
Later, she appears as Boa Hancock's personal attendant, staying close by when Hancock falls ill with a mysterious ailment.
Content compiled by AnimeList.moe from publicly available sources.
