- "Hello, Moira."
"...Charles." - ―Professor X and Moira MacTaggert
P. Xavier is the brain-dead twin brother of Charles Xavier whose body Charles inhabited in the original timeline after his body was disintegrated by Jean Grey.
Quick Answers
Who is P. Xavier in relation to Charles Xavier?
How did Charles Xavier survive after being disintegrated by Jean Grey?
Who took care of P. Xavier after he became comatose?
Did Charles Xavier ever discuss his twin brother in his lectures?
History
Original Timeline
It is unknown what happened to him between his birth and X-Men: The Last Stand, but at some point he became brain-dead and was rendered comatose. He was then later placed under the care of Charles' old friend Moira MacTaggert on Muir Island.
X-Men: The Last Stand
Charles gave a lecture about his brother, asking if it would be possible to transfer the consciousness of a dying father of four children with terminal cancer into the body of the brain-dead patient. Later, after his body was destroyed by Jean Grey, who was possessed by her Phoenix alter-ego, Xavier transferred his mind to the body of his twin in order to escape death.
The Wolverine
When Logan returned to the United States from Japan in 2015, Charles approached him in his brother's body, though he still needed a wheelchair to move around since his brother's body is alluded to be in a restricted movement due to being in a coma for a long time and brain-dead since birth.
X-Men: Days of Future Past
Charles would continue to use his brother's body for the next eight years, up until the last surviving members of the X-Men send Wolverine back in time to 1973 in order to prevent the assassination of Bolivar Trask and the creation of his Sentinel program. After an unknown period of time, the Sentinels found the remaining X-Men and were about to fire on them, including Charles (in P. Xavier's body), before Kitty Pryde lets go of the time-traveling Wolverine, erasing their timeline and changing their past and future.
Revised Timeline
X-Men: Days of Future Past
Given that Logan, while possessing his past-self with help from Kitty's power of chronoskimming, guided Charles to prevent the dystopian Sentinel-ruled future by using his knowledge of future events such as Jean Grey's death to change the past, his physical death at the hands of Jean in 2006 was averted, meaning that P. Xavier's body would not have been inhabited.
Relationships
Family
- Unnamed Stepfather
- Sharon Xavier - Mother
- Charles Xavier - Twin Brother
- Mystique - Foster Sister
- Juggernaut - Stepbrother
Allies
- Moira MacTaggert - Former Doctor