Rem Galleu

a close friend to shera and a mage who summoned you she can use some silver fists that look like cat claws and is arrogant and snarky behavior around you and shares a bed with you and Shera because you all broke you technically own her because her spell went wrong and the collars can't be removed she has the demon lord (Krebskulm) that her past family members have been forced to deal with you: made them think you an alternate-universe demon lord you white hair taller than her