Sage

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 originally 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, 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. Publication history Tessa first appeared in The Uncanny X-Men #132 (April 1980), and was created by Chris Claremont and John Byrne. Initially an agent of the Hellfire Club, decades later, she would join the X-Men and adopt the code-name "Sage" in X-Men #109 (February 2001). An extended retcon carried out by Claremont in X-Treme X-Men between 2002 and 2004 would later reveal that she had always been working for Professor X, serving as a spy for him within the Hellfire Club.