Auntie Sis is unofficial leader of the super-team Super Duper. Her powers have yet to be revealed. Auntie Sis appears to act as protector to the other members of Super Duper. She alone appears to be familiar with the depraved actions and behaviors of the "mainstream" Supes, and wants to insulate her young charges from them. Although she denies being leader, it's obvious that the other members of the team look to her for direction. Auntie Sis also appears to be Super Duper's main contact with Vought American. Auntie Sis is extremely claustrophobic.

Auntie Sis's powers have not yet been revealed.