Domino

Domino was a member of the Brotherhood of Mutants who saved Toad from the MRD. She also apologizes to Rogue because of her inconvenience with Toad. She later persuaded Rogue to join the Brotherhood. During the Brotherhood's attempt to assassinate Senator Kelly, she asked Rogue to absorb Warren Worthington Jr.'s memories and know Kelly's whereabouts. When the Brotherhood was all set, she fired a bullet but it was stopped by the X-Men. In an alternate future, Domino is one of the mutant prisoners of the Sentinels. She was later recruited to join Professor X's X-men in that timeline. Together, they took down a group of Sentinels.

Origin
Domino was the result of a top-secret government breeding program known as Project: Armageddon, which was made specifically to create the perfect weapon and genetically engineer fighting soldiers. Out of the test subjects, Domino was the only survivor but her powers of 'good luck' was deemed a failure in the case of meeting the project's goals. She was freed from the project by her biological mother who left Domino with Father Rudolpho Boschelli, leader of the cult called the Church of the Sacred Heart which was based in Chicago. Domino lived within this cult until she turned thirteen and escaped. She decided to become a freelance mercenary and worked with various government agencies. While working for the NSA, Domino was tasked to guard the genius, Dr. Milo Thurman, whose analytical ability made him too dangerous for the government to set free. While guarding him, Domino and Dr. Thurman somehow fell in love with each other, even going so far as getting married, apparently officially. Dr. Thurman gave Domino the nickname 'Beatrice' due his obsession with Dante's Inferno. When A.I.M soldiers raided the facility, Milo and Domino separated, with Milo believing that Domino was killed during the raid.

Powers and Abilities
Domino's mutant powers essentially give her good luck. She can subconsciously and psionically affect the probabilities and make things work in her favor and against others. Mostly, she has used her powers subconsciously, but she has shown the ability to force her powers into working. She is an expert in using firearms and explosives, a highly skilled mutant in the field of martial arts and hand-to-hand combat