What character is resurrected in "X-Men: The Last Stand"?

The character resurrected in X-Men: The Last Stand is Jean Grey, who returns as the Phoenix.

Jean Grey appears to have died while saving the X-Men at the end of X2: X-Men United, but she emerges alive from Alkali Lake in the next film. Professor Xavier explains that Jean possesses a dangerous alternate personality or force known as the Phoenix, which he had tried to suppress when she was young.

After her return, Jean’s immense telekinetic and telepathic powers become increasingly destructive. She kills Professor Xavier and joins Magneto’s Brotherhood of Mutants, while the X-Men try to stop her during the conflict at Alcatraz Island. The film’s climax presents Jean as both a tragic former teammate and the central threat created by the unleashed Phoenix.

The answer is sometimes shortened to “Phoenix,” but Jean Grey is the character who is resurrected; Phoenix describes the powerful persona or force associated with her transformation. The movie draws loosely from Marvel Comics’ famous Dark Phoenix Saga, although its explanation of the Phoenix differs substantially from the original comic storyline. X-Men: The Last Stand was released in 2006 and stars Famke Janssen as Jean Grey/Phoenix.