Not much is known of the Samoan mutant called Mondo. He was once friends with Cordelia Frost, Emma Frost's younger sister. In an attempt to make a bid for the position of White Queen of the Hellfire Club, Cordelia had Mondo contained and handed him over to the Inner Circle of the Hellfire Club. Cordelia's scheme backfired; the Hellfire Club kept Mondo but denied Cordelia membership. Cordelia went to Emma, headmistress of the Massachusetts Academy, for help and, soon after, Mondo was rescued by Generation X and subsequently accepted an invitation to join the school.