When she was only six years old, Cecilia Reyes saw her father gunned down in a drive-by shooting. From that moment on, she dedicated her life to becoming a medical doctor.
When her latent mutant powers awakened, Cecilia Reyes sought help from Charles Xavier. He invited Reyes to join the X-Men but she declined, instead working as a trauma surgeon at the Our Mother Mercy Hospital in New York City's South Bronx.