M'gann M'orzz

Early Life
M'gann M'orzz claims to hail from the planet Mars.

Alien Bartender
M'gann M'orzz worked at a secret alien bar in National City, where she has taken the form of a human woman to blend in. When J'onn J'onzz came to investigate the alien bar where she was startled by his appearance. M'gann left suddenly telling him her shift ended. He confronted her outside the bar where she took the form of a Green Martian claiming to be the last daughter of Mars.

Powers

 * Martian Physiology
 * Shapeshifting: Due to her Martian physiology, M'gann is able to change her form at will, even on a cellular level, completely altering her physical appearance, allowing her to transform or mimic other people or animals and other creatures.