Sinthea Shmidt
Sinthea Shmidt (Mother Superior / Sin / Red Skull) appears in 40 issues in grailworth's catalog, and was first published in 1984.
Origin
Every appearance we value
Captain America: Reborn (2009) 1 issue
Civil War Chronicles (2007) 1 issue
Fear Itself (2011) 4 issues
Secret Avengers (2010) 1 issue
Uncanny Avengers (2015) 2 issues
Character appearances from the Grand Comics Database, CC BY-SA 4.0.