The head of a major supermarket chain located in the United States, Walter Barrett is a cold, asocial man with no interest in a daughter.

As such, he extracts from her a promise that she would learn English before school started, she would get good grades, and she would not use her mutant power, in exchange for which all her material wants would be provided for without question.

[1]Resident mischief maker Julian Keller (codenamed Hellion) finds himself instantly attracted to Mantega and begins courting her.

She rejects him after he makes derogatory remarks about her roommate, the shy Laurie Collins (later known as Wallflower),[2] but the attraction remains mutual, and despite herself Sofia later ends up flirting with Julian during a combat training exercise.

Her command decisions weaken further when Wither is arrested for the accidental death of his father, and she briefly sides with the Hellions, Julian's squad, to break him free.

[6] Thereafter, Sofia's temper eases again until the school dance, where she catches Laurie manipulating Prodigy to make her ex-boyfriend Elixir jealous.

[8] Sofia loses her powers along with 98% of the mutant population when the Scarlet Witch produces a reality-bending spell in an attempt to solve the human/mutant problem.

Barry explains that he is a depowered mutant, and is actually her old friend from the Xavier Institute, Beak, whom she did not recognize because of his altered appearance post-M-Day.

[13] With the Warriors fighting a losing battle and a little boy caught in the crossfire, Sofia charges towards Cancer, providing enough distraction to give her friends the upper hand.

[14] Upon her release from the hospital, Mantega reconsiders Night Thrasher's offer to join the team right as he is about to disband the group following the disastrous encounter with the Zodiac.

[16] A long time later, Sofia somehow heard of the Mojoverse's new-found obsession with mutants and started live streaming and climbing the broadcasting charts.

After being reunited with Hellion and her other friends, she revealed to them that she had to let herself get killed in order to escape, but Spiral, Adam X and Shatterstar still needed rescuing.

During the House of M crossover (which later led to Decimation), Wind Dancer was shown as a S.H.I.E.L.D trainee, in the Hellions Squad, under Dani Moonstar's supervision, and involved in a rather intimate relationship with Scion (Julian's counterpart).

After Wallflower was killed and her influence severed, the surviving young mutants teamed up to attack Emperor Sunfire, who headed Project: Genesis, a plan to mutate baseline humans.