Ponkotsu Hero Eileen

ぽんこつヒーローアイリーン

Eileen, who works as a hero on Mars, screws up and gets exiled to Earth. There, she meets Lovely Melon, an unemployed girl who is trying to play a hero...? A gag manga about a (real) Martian hero and a (cosplay) Earth hero! (Source: Comic Fuz, translated)