Real Name: Tessa

Current Group Affiliation: Excalibur III

Former Group Affiliation: Hellfire Club, X. S. E. I, X-Men I

1st Appearance (as Tessa): X-MEN(v.1)#132 (1980)

Known Superhuman Powers: Sage has a cyberpathic mind, enabling her superhuman memory storage in her brain. After analyzing a mutant, she can enhance or evolve their existing power into the next mutation. Sage can also sense other mutants and can reflect psionic attacks against her back on their source.

Other Aliases: None