Oh hell yes I am DOWN for this background evolution. Delicious trauma smoothie. Gives me a lot of room to decide if they're going to be gunning for Reyson too once he becomes known. Gosh, this way he wouldn't necessarily know it is vampires he might just think that a powerful noble ally stabbed his family in the back for no reason! Delightful!

For the sake of meatier background CR: The Falkenraths are/were mostly refined and well-behaved, with an excitable streak that surfaces now and then. The brother and sister around the Wales trio's age were probably into a mutual hobby with one of them (riding horses? chess? literature?) as a bonding point, Reyson would have tagged along but not been as skilled, being a much younger child. Entirely plausible that they made Lamorak look after him for the afternoon during visits a few times on the basis that "we have found you a playmate on your level of maturity".