Stella is a little blonde girl from an orphanage in England that Sister ran. Whilst initially thought to be small and cute, she is a powerful fighter and sometimes speaks in a threatening tone to show her superiority. When she is angry she has the ability to turn into a giant and look extremely masculine, very closely resembling Raoh from Fist of the North Star. She once had a crush on Sister, which made her hostile towards Maria.
Source from Wikipeida