Sage (Marvel Comics)

Sage
Sage by Salvador Larroca
Publication information
Publisher	Marvel Comics
First appearance	The Uncanny X-Men #132 (April 1980) (as Tessa) X-Men #109 (February 2001) (as Sage)
Created by	Chris Claremont (Writer) John Byrne (Artist)
In-story information
Alter ego	Tessa
Species	Human Mutant
Team affiliations	X-Force (Dawn of X) Multiverse X-Men X-Treme X-Men S.W.O.R.D. Exiles New Excalibur X-Men X-Treme Sanctions Executive The Hellfire Club
Notable aliases	Tessa, Lady Tessa, Diana Fox, Britannia
Abilities	Ability to jumpstart mutant powers Superhuman mental processing Perfect memory Data analysis Movement replication Telepathy Skilled martial artist and markswoman

Sage, also known as Tessa, is a character appearing in American comic books published by Marvel Comics. She has most often been associated with the X-Men and the Hellfire Club, whom she spied upon for Professor Charles Xavier.

A mutant, Sage possesses a number of mental abilities and was presented as the personal assistant to the Hellfire Club's Sebastian Shaw, but an extended retcon revealed that she was one of the first mutants discovered by Professor Xavier. She has been a member of the original X-Men teams, Excalibur, the Exiles, X-Force, and a cross-dimensional X-Men team similar to the Exiles known as the X-Treme X-Men. Sage appears in the television series The Gifted played by Hayley Lovitt.