Tina Hurst

Daughter of two researchers who worked on the mask. During the "mask accident", her mother, who was pregnant with her at the time, was exposed to deadly amounts of radiation. Knowing it was too late for Tina's mother, in a desperate attempt to save his daughter, her father took a gamble and fused a mask with her body. She is the only person who is able to live with the mask and not suffer from its side effects.

(Source: Hero Mask Wiki)