Beldam

Beldam is the eldest sister of Marilyn and Vivian and the leader of the Shadow Sirens. She blames Vivian for everything, but after Vivian joins Mario's team, she starts doing that to Doopliss. She exalts herself for things others have done, such as awakening the Shadow Queen, which Grodus did the majority of.

Paper Mario 2 Stats
Boggly Woods Battle

HP 9, Attack 1, Defense 0 That's Beldam. She's the oldest sister, the leader of the Shadow Sirens. She can make her partners big and make us tiny, and attacks with weird magic. The worst thing about her is that sinister snicker. She sounds so totally evil! I mean, she's just the sort of person you want to avoid like the plague, y'know?

Palace of Shadow Battle

HP 30, Attack 5, Defense 0 That's Beldam. She's the leader of the Shadow Sirens. Her special move is a blizzard blast. If it hits you, you'll totally freeze. She has lots of other tricks up her sleeves, too. I wonder what that plan was that she mentioned? What do you think they're up to?