Meba (メーバ Mēba) is the one of the antagonists in the 2015 movie, Nobita's Space Heroes.
Meba, along with Hyde & Ogon convince the Pokkuru Planet councillor to let them improve the land and re-open as Pokkuru Land. Aron, one of the planet's sheriff, takes suspicious with their actions and investigates their true purpose. While investigating, a guard (which is a disguised space pirate) spots him and chases him however, Aron escapes. Meba captures both Aron & Nobita, who eavesdrop the Space Pirates' conversation.
Later, Meba tries to kill Aron but Gian punches her hard. Later, Shizuka finishes Meba with her Super Hot Spring Beam deforming her into an amoeba.
She was called Ruthless Girl because of her actions. She abuses some space pirates. She also can deform herself just like a Amoeba, which is a pun to her name.