YESSSS i really love the idea of him having some kind of mental or physical health thing, and i could see it causing some mild agoraphobia too. maybe that is part of where his intelligence like pokes in too, researching, trying to find a way to help himself with what ails him in that sense.

if eh did have mild agoraphobia, it would be even that more surprising for her when he like shows up jklre;a lmao

otherwise it may be fun to play on some bridgerton themes like how antony always had that like weight upon him due to his father's death - maybe his father died of whatever is afflicting him so there's a lot of pressure wrt all that