History
Mrs. Taylor, along with her family, was kidnapped by Weapon-X and taken to the Neverland concentration camp. In Neverland, mutants deemed useful (like the Taylors) were branded with a green M on their hands, whilst those deemed less useful were branded with a red M and executed.
She later helped her children, Billy and Wendy escape Neverland with the aid of a scientist called Dr. Windsor, only for it later to turn out that Dr. Windsor was Mr. Sinister in disguise who started experimenting on the children.
Powers
Mrs. Taylor can summon blue balls of glowing energy from her hands.