[@Genkai] During the cave in she ended up with claustrophobia. Standing in the mouth of a cave wouldn't bother her, but going further into a cave would be a severe problem for her (I'll edit my post to reflect that). She became more fond of the skies because they were freeing, instead of constricting like being underground. 

If she's locked up in a small room, she'll more than likely hyperventilate. Going underground again... Probably not happening for a long time, if ever.

I have claustrophobia IRL, so I thought having her with the fear as well might be an interesting take (especially since she's a dwarf).