A White Martian who could not stand the horrors her race committed against the Green Martians , M'gann tried helping prisoners escape .
Miss Martian appears in Season 2 of Supergirl , portrayed by Sharon Leal .
A Miss   who could not stand the horrors Martian 's race committed against the Green Martians , M'gann tried helping prisoners escape .
Miss Martian appears in Season 2 of Supergirl , portrayed by Sharon Leal .