Martinique Jason, also known as Mastermind, a fictional mutant supervillain in the Marvel Comics universe. She first appeared in Wolverine/Gambit: Victims #2 (September 1995) and was created by Jeph Loeb and Tim Sale. Martinique is the daughter of Jason Wyngarde, the first Mastermind and member of the first Brotherhood of Evil Mutants, and the half-sister of Regan Wyngarde, also known as Lady Mastermind.