Cannonball: Sam Guthrie discovered his mutant power while attempting to escape a collapsing mine. Manipulated by Hellfire Club member Donald Pierce into serving as one of his operatives he was sent to battle Professor X and the New Mutants. Refusing to kill the young heroes, he joined them to defeat Pierce.
Sunspot: Roberto da Costa was a young, wealthy Brazillian when his mutant power attracted the attention of Donald Pierce. After a failed kidnapping attempt Charles Xavier sent his New Mutants to help da Costa defeat Pierce. Da Costa later joined the New Mutants, under the code-name Sunspot.
Wolfsbane: Rahne Sinclair was raised by Rev. Craig in a Scottish orphanage. Mistaking the manifestation of her power as demonic possession, Craig attempted to perform an exorcism. She was rescued and adopted by Doctor Moira MacTaggert and eventually became part of the New Mutants training team.
Karma: Vietnamese-born Xi'an "Shan" Coy Manh demonstrated and extreme ability to sacrifice in order to save the lives of her siblings. Having honed her abilities under Charles Xavier at various times, Coy Manh is currently a faculty member at the Xavier Institute.