Moira MacTaggert

Dr. Moira MacTaggert (sometimes spelled MacTaggart, McTaggart, McTaggert) , more recently known as Moira X, is a fictional character appearing in American comic books published by Marvel Comics. She first appeared in The Uncanny X-Men #96 (Dec. 1975) and was created by writer Chris Claremont and artist Dave Cockrum. She works as a geneticist and is an expert in mutant affairs. She is most commonly in association with the X-Men and has been a member of the Muir Island X-Men team and Excalibur.

For the first 44 years of publication, Moira was traditionally depicted in comic books as a supporting character to the X-Men and a human love interest for central character Professor Xavier. In 2019, as part Marvel's House of X and Powers of X relaunch of X-Men comics by writer Jonathan Hickman, Moira's backstory was fundamentally changed, revealing she had been a mutant all along, with a rare power that let her redo her life every time she died. The story set the stage for a major status quo change for X-Men comics, including the formation of the mutant nation state of Krakoa. Later still, Moira betrays the mutant cause and becomes an antagonist to the X-Men.

Moira MacTaggert has appeared in X-Men: The Last Stand, portrayed by Olivia Williams, as well as X-Men: First Class and X-Men: Apocalypse, portrayed by Rose Byrne.