Sage a mutant whose real name is unknown but she has commonly been known as Tessa or Diana Fox. Sage possesses a mind so superior it's more akin to a supercomputer than a human brain. She also has biokinesis & is able to control her entire body, it's functions, as well scan the DNA of other beings & even jump-start & enhance the abilities of others. She's been a spy for Xavier for many years & has infiltrated the Hellfire Club to play an assistant to Sebastian Shaw. #XMen #Marvel