Merwin Ademeyn of House of Ademeyn is a character in The Witcher premium module "The Price of Neutrality". He is a recently appointed royal courtier who has pursued his elder sister Deidre all the way to Kaer Morhen, considering her to be a dangerous mutant. He wishes to force Deidre to relinquish her claim to the estate and titles she recently inherited from their father. According to Merton Bringgs, the prince is in charge of the expedition in name only, while the sorceress is the one actually running things on a day-to-day basis.