Rem (レム) is a maid in service of Margrave Roswaal L Mathers alongside her sister, Ram. She is one of the main supporting characters of Re:Zero, with major roles in Arc 2, Arc 3, and Arc 7. During the first half of Arc 2, she also served as the secondary antagonist.

While initially distrustful of Subaru, she eventually opened up to him and even developed strong feelings for him after he saved her. However, at the end of Arc 3, she had her name and memories eaten.