When Alopex was a young human girl in her small village, she and her brother Takeshi (who would one day be known as Tiger Claw) were playing in a playground when they came across a Kraang portal which they decided to enter, believing it to be a magic door. Afterwards, the Kraang mutated and experimented on them. After many months of hardships, they escaped together through a portal back to Earth. Believing that they were monsters now, they fled their home and found refuge in a circus sideshow, but felt their skills were much too valuable for that and eventually became top-level assassins in the criminal underworld, who were notorious and feared. Overtime, Alopex manifested a personal vendetta against Takeshi, blaming him for ruining her life due to her mutation, raising her in the assassin