Alter Ego: Synthia Schmidt
Other Names: Mother Superior; Red Skull; Sinthea Schmidt
First Appearance: Captain America (vol. 1) #287 (Nov. 1993): "Future Shock!"
First Appearance (Additional Details): (unnamed, without costume) Captain America (vol. 1) #287 (Nov. 1993): "Future Shock!"; (as Mother Superior) Captain America (vol. 1) #290 (Feb. 1984): "Echoes"; (as Sin) Captain America (vol. 1) #355 (July 1989): "Missing Persons"
Super? (Has Super Powers/Special Abilities/Technology): Yes
Number of Appearances: 13
Teams/Affiliations: Sisters of Sin (leader)
Note: Red Skull's daughter
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