i'm at work you know what the hellllll that means random peculiarity headcanons unlocked, i spend a lot of time thinking about this
millard doesn't get sunburned on account of the sun going right through him, unfortunately that means he also doesn't get enough vitamin d, since his skin can't absorb sunlight, so his immune sytem is kinda shot to shit
claire can only digest food she eats with her backmouth, the front does have tastebuds but it doesn't have a connection to her stomach, they do both have vocal chords, she can scream really loudly and does in fact use this to her advantage
plants are gossips, especially trees, forests are often interconnected huge living organisms, and there's very little that stays hidden from them, fiona usually susses out the trees and grass when she gets to a new place to get a feel for it, though while trees do have a lot of knowledge, they're not above lying to people, even fiona
hugh is an actual beehive, his insides are a real functioning hive and an honest to god medical marvel idk how he digests food, sometimes baby bees get born in there and everything, he hacks up honeycomb when he's really sick
olive is like a human weather radar, she can feel the changes in the air pressure when it's going to storm or snow, and she can predict the direction of the wind, she can't speak to it or understand it but the wind does like her and will play with her sometimes
emma runs cold, she doesn't actually feel the cold but her hands and skin are always cold to the touch, her insides on the other hand are like a furnace, she can't use normal thermometers when she's sick cause they always freak out
librarians are archivists first and foremost, they made the soul jars to preserve peculiardom and keep it safe, and to assure a legacy for generations in the future, much like ymbrynes and some diviners (and honestly i hc most peculiars have a lesser version of this sense) they can sense people's peculiarity, though librarians do it by seeing their souls, it does take a great deal of honing their talent
it takes a lot for people with superstrength to actually build muscle, bronwyn is already built like a brick house, but she also gained a lot of muscle from constantly straining herself and pushing against the edges of her peculiarity, not many superstrength peculiars really have the opportunity to push over houses or swing bricks of concrete around on the regular
enoch's heartbeat is scarily strong and loud, and he can sense other people's heartbeats when they're around him too (he can absolutely recognise the heartbeats of people he knows) and he can tell when something dies close to him, be it a person or an animal, he's a bit like a bloodhound, though he's never bothered to train it so it doesn't really work long distance
as she gets more adept at using her peculiarity, noor can make her skin glow at will, she can also generate a little bit of heat if she's swallowed enough light, though this does eventually take a toll on her, she's not made to withstand heat like emma is, she also doesn't get blinded from looking into the sun or into bright lights
while horace can't have detailed visions about friends or loved ones, he does get intuitions and sometimes knows more about people than he's supposed to without realising it's his dreams, he'll mention a childhood detail or favourite food that no one actually told him, or move some towels downstairs right before people come back soaked from the sea
most ymbrynes wear glasses cause their bird vision fucks with their human vision, some are colour blind, and some who have bird forms that are nocturnal are very sensitive to light, miss peregrine's got incredible long distance vision but she is nearsighted as all hell