First Appearance: Tower of Shadows #5 (May 1970): "Flight into Fear!"
Creators: Wally Wood
Number of Appearances: 1
Enemy of: Xzar
Yrill was an alien princess who helped Johnny defeat the evil sorcerer Xzar in a 7-page fantasy story which was explicitly set in an alternative dimension.
Suggested links for further research about this character and the character's religious affiliation: