the set control rotation takes in a controller reference. So you would get the controller of the character and plug it in. I don’t know the settings you are using, but the camera is likely using the player’s rotation, which is why when you are turning and then dismount, the character is rotated to one side and the camera is moving in relation to that.
Edit: I don’t know how you are determining the player’s location and rotation when dismounting. But you should set that data before you call the move component to function. When setting that data, and if the camera is attached and following the pawn’s rotation, the roll needs to be 0 prior to moving the camera’s relative rotation with the move component to function.