ラム

One of the twin demons who work at Roswaal's mansion as maids and Rem's older sister. Ram is seemingly self centered and does things at her own pace, however in actuality she maintains a distance from people to ascertain them. She believes that Roswaal is the greatest and no one else is as precious except for her sister Rem. She is slightly more outgoing in comparison to the generally taciturn Rem, who generally allows Ram to take the lead in their sisterly bond. [From Re:Zero Wiki]