Can't ask even once what the vampiric hunger feels like while you can be very concerned about Shadowheart's wound. Can't give him that portrait. Can't give him any gifts, which was surprising because he hasn't been given anything nice for 200 years and it would be common sense for the player to want to give him something.
Adding salt to the wound is the fact that you can give Shadowheart the flower she offhandedly mentions liking, so it's not like giving gifts to the companions isn't a thing in the game. It's just a thing with this one companion. For some reason.