Jean Grey, the Mind Reader
After Magneto had recruited his children, your parents contacted him in order to help you master your enormous psychic abilities. Being the lone telepath, there's little that Magneto could do to help you hone your telepathic abilities, leaving you very receptive to the pain and grief felt by others. Their minds were an open book to you, but perhaps none more so than your lover, Weapon X, a broken and tormented man. During a mission, you were captured by the Prelate Scott Summers and delivered to Sinister, one of Apocalypse's Horsemen. He performed tests and experiments on you until you were rescued by the team. As Prelate Summers and Weapon X fought, your paramour lost one of his hand, while Summers lost one of his eyes. Instead of coming back to active duty, you and Logan left to fight Apocalypse's forces on your own. But now that the final battle has started, you've come back to lend Magneto a hand.
As a powerful telepath, you have the ability to enter other person's minds each night and discern their true intentions, their true alliegeances on every nights. Just send me a PM saying Read Player X's mind.
Also, your bond with Logan is so strong that you would be crushed should he die. As such, should he die before you, the next time you gather to vote, your vote will be worth twice its value for that phase only.
You are allied with the X-Men, you win if you eliminate all forces of Apocalypse.