One of the twin demons who work at Roswaal's mansion as maids, Rem is Ram's younger sister. Her cooking skills are much better than her sister's. Rem tends to speak in a superficially polite manner and sometimes acts without thinking. Because of her respect and guilt toward her sister, she used to think of herself as inferior. After Subaru saves her, she falls deeply in love with him, becoming one of his most loyal followers. Rem will stick with him no matter what happens, even if Subaru rejects himself.