Responses
That's a good theory!
Some other person said maybe her body got weak because she was soaked in water when her dad found her
But your theory is more interesting
beta
random thought. i think lily has a weak constitution because she got used to her dad's environment while she was with him before.
like how her dad feels sick due to earth's atmosphere /environment/etc.
so now that she was sent back to earth it somewhat makes her faint sometimes like in that fight or make weaker than her peers.
just a theory tho~