Wall Scroll | Re:Zero | Rem

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.

Re:Zero Starting Life in Another World
On his way back from the convenience store, a boy named Natsuki Subaru is suddenly summoned to another world. The helpless boy arrives into this world with nothing at his disposal, except for the one ability he acquired… That being Return by Death, the power to rewind time upon dying. To protect those for whom he cares, and to recover the irreplaceable moments that he so clearly remembers, the boy must strive to resist despair and confront a cruel destiny. 

(from Fandom RE:Zero Wiki)