Lyco is a Mobian Wolf and the twin sister to Leeta. As refugees from one of the many wolf packs scattered by Dr. Ivo Robotnik, Lyco and her sister were taken in by Lupe Wolf and became official members of her Wolf Pack as they followed her in settling their people's ancestral lands and founded the new Wolf Pack Nation. As time passed though, the relative peace of their home caused a restlessness in the twins, who craved adventure and excitement. This eventually led to Lyco becoming an agent of the Secret Freedom Fighters under the callsign "Queen of Hearts."