Circadian

A mask; one of the licensed supernormals in the months immediately after the Hope Tower Incident. Real name: Hannah. She is primarily a fighter, being proficient in a couple of martial arts styles. She has been learning kickboxing since she was old enough, and watching professional matches as long as she can remember. Her fighting skills are all natural, however; her special ability is limited time travel: she can transport herself and anyone she is touching forward by exactly one day, sometimes without the other person noticing.

Also the title of a short story about her showdown with Mandate.