Abilities: Telepath, trained in martial art. Her mutant power aids in allowing the other members of the X-Treme X-Men to contact her at any time by wearing special glasses that are connected to the network that is her mind as long as she is online, which she usually is because she is very devoted to her work.
Weakness: Virtually none, she has the mental capabilities to block out any psychological attacks if they arise.
Mutant Powers: Sage is known as the "living computer" of the X-Men, she can access information and conduct searches simply by looking into her own mind. She can also detect mutants, and she has the ability to temporarily catalyze a latent mutant's powers (in other words, she can temporarily fully activate a mutant's powers that are still developing).
Personality: She has proven to be a good friend, but is also quite deceptive as she has proven with Sebastian Shaw, Black King of the Hellfire Club (when she was spying on him under Professor X's orders).
History:When Tessa was younger and just becoming aware of her powers, Professor X recruited her as he did with many mutants. But in Tessa's case, he trained her to be a spy and she was sent to spy on Sebastian Shaw, Black King of the Hellfire Club. She was his personal assistant for many years and advised him in many business affairs, all the while spying on him and reporting everything to Professor X. But eventually, he became aware of her betrayal when she left him and returned to the X-Mansion. When she returned, she became an advisor to the X-Men and helped train some of them for awhile, until Storm decided to take a small group of the X-Men, renamed Tessa with the codename "Sage", and thus created the X-Treme X-Men (consisting of Storm, Rogue, Bishop, Thunderbird, Sage, and Psylocke, R.I.P.). She joined Rogue and Serina in aiding fugitive mutants who were wrongly accused.
Personal Quote:"We X-Men are family. Never forget that. Attack one, you attack us ALL. Come at us again, in person or through surrogates, and that's the last mistake you'll ever make. Are we clear?"