Some downsides to the demigods powers/just being a demigod in general
Quick TW, I advise you tread with caution because some of these can be darker than the rest
1. When Will heals he's literally putting a piece of his own health into someone's body, so if he goes too far he'll end up killing himself
2. All the Apollo kids have very very sensitive ears, which contributes to sensory issues, getting overwhelmed, and meltdowns
3. Hazel/the Hecate kids struggle separating reality from illusion sometimes and can be prone to psychosis and hallucinations
4. Hypnos kids very ironically have insomnia
5. Similarly, Poseidon kids are prone to dehydration
6. Zeus kids are obviously asthmatic
7. The Hades kids have hypermobility issues/hEDS
8. Any chthonic demigods also struggle with fainting disorders
9. Some Hermes kids have ironic navigation issues, and can never remember any directions they're given
10. Apollo kids can't lie even if their life is directly on the line
11. Aphrodite kids are prone to NPD and struggle to form relationships
12. Ares kids are just as prone to BPD or bipolar and struggle with vulnerability and letting people in
13. Rachel commonly dissociates and sometimes feels like her body isn't actually hers
14. Hazel has problems with stiff muscles and her body feeling like a rock itself
15. Frank sometimes forgets he's actually a person
16. Athena kids are prone to anxiety and panic disorders, paranoia, and agoraphobia
17. Reyna forgets she has an actual body of her own
18. Demigods in general are prone to POTS or autoimmune disorders
19. Leo is sensitive to any other kind of burn except fire (steamburns/carpetburn/sunburn/etc)
20. Nico is prone to hypothermia if he overuses his powers
21. Leo and Will are both prone to overheating from their powers
22. Iris kids are ironically either colorblind, or have the color perception a shrimp. There is no in between.
23. Dionysus kids often have ABS (Auto-Brewery Syndrome)
24. Hephaestus kids are prone to heat stroke/fevers
25. As well as issues with weakness and fragile bones/joints in their legs
26. Some Apollo kids can scream so loud they can burst eardrums or even stun those close enough, although this usually leaves them with raw, bleeding throats
27. Demeter kids are prone to scoliosis due to how frequently they need to bend down to garden
28. Hermes kids usually mask their real personalities with a "chaotic mask" so they usually forget what they're really like
29. Iris kids are very sensitive to light and often need to wear sunglasses just to be able to walk around because of retina sensitivity
30. Occasionally, Athena kids can experience degeneration in their optic nerves that can cause blindness and eventually spread to other areas of the body (bilateral optic neuropathy is what I believe it's called but feel free to correct me on that)
Add to this list as you please, and this was all just some silly things me an my gf thought of, I apologize if we upset anyone
