When the mutant race started to repopulate after the Decimation, not all of them joined the X-Men. Blake Schiel was a petty criminal from an abusive background who reveled in the opportunity to use her new powers and strike back at her tormentors. Her tantrums drew the attention of the X-Men and other heroes before the foundation of Krakoa. Animax was invited to the island nation like other mutant criminals, under the promise of good behavior. Time will tell.