She failed , fleeing to Earth , where she hid for 300 years under the identity of Megan Morse .
A White Martian who could not stand the horrors her race committed against the Green Martians , M'gann tried helping prisoners escape .
White Martian failed , fleeing to Earth , where White Martian hid for 300 years under the identity of M'gann   .
A White Martian who could not stand the horrors her race committed against the Green Martians , M'gann tried helping prisoners escape .