In the "Re:Zero" manga series, which of the following Sin Archbishops eats Rem's existence?

In the Re:Zero manga series, Ley Batenkaitos is the Sin Archbishop who eats Rem's existence. Ley possesses the authority of Gluttony, allowing him to devour memories and even erase a person's existence from the memories of others. This power enables Ley to consume Rem's existence, effectively erasing all memory and knowledge of her, making her seem as if she never existed in the first place.