Like, what are your Headcanons about Jason, Percy, Nico and Will when they get older? Who becomes a silver fox and who loses their hair? Who ages gracefully and who looks like they pulled a deal with Satan and still look young for a middle aged man? Who mellowed with age and who's a grump? Who gets a pauch and who still looks in shape? Just general habits and body hcs as they get middle aged.
Ooooh that sounds interesting.
I have a bad feeling all demigods age a little faster than the average mortal, they’ve had to carry the world on their shoulders and that left it’s marks. Anyway, here we go:
Percy starts greying first, not just because he has been through more in some ways. His hair’s black too, so grey stands out a lot more.
He’s grown a beard in his early twenties, and looks so much like his father it irritated Sally in the beginning.
He definitely does not mellow with age, still as much of a little shit and ready to start a fight at a moment’s notice. He’s somewhat wiser now though, and scarily powerful. He may not be able to move as quickly as 12yr old Percy could, but his skill accumulated over years of fighting and training and surviving is down right insane.
Percy travels around for a while, he joins satyrs in finding new demigods. Percy’s in his thirties when he settles at camp as a teacher and helps Chiron run the place. He gets a room in the big house because he is not the only child of Poseidon anymore and doesn’t wanna creep the kids out.
He has devoted a lot of time to arrange good communication with Camp Jupiter, to have events together every now and again, and to help each other out when either is in trouble. He and Reyna grew to be close friends, who are jokingly bitter about the youngsters thinking they own the place.
Jason grows up nicely, he loses the puppy dog aura and a fair few campers have an awkward crush on him. He looks like that one teacher, with stubble and dark framed glasses, who loves all his students, always has a cup of tea and a jumper over his dress shirt. Unlike Percy, he definitely mellows with age, unless someone provokes him he isn’t quick to prove that he hasn’t lost any of his skill.
It took Jason a long time to come back to New Rome. Being in Camp Half Blood has shown him that a lot of things are going wrong in the Roman equivalent, that it is not a good environment for young demigods, that he’s been groomed to be a child soldier against his will. Eventually however, Jason grows up enough to realise that he has the power to change that. Reyna and Frank did a lot of work already, but it’s not enough yet for Jason. He makes sure the legion isn’t run by 15yr olds anymore, but by adults like him and Reyna who can shoulder the responsibility. Who can be a parental and authoritative figure to new demigods, help than settle and learn rather than mold them into a shape acceptable to Roman standards.
His wrinkles are mostly smile lines, and despite only a year difference, people always think he’s much younger than Percy. He never stops being the dad friend and fiercely supporting all those close to him
Nico is absolutely stunning in his twenties, there’s n other way of putting it. He grows his hair out to a nice length that can be put in a ponytail or a bun, he grows tall but loses his lankiness in favour of lean muscle and defined lines. He never grows a beard, he can’t, but he doesn’t want to either.
Percy thinks he looks similar to Hades when Percy first saw him: graceful and elegant, dangerous like a panther waiting to pounce.
Later on, much to Percy’s dismay, Nico doesn’t go grey. His hair is raven black until late into his fifties (while Percy is pretty much flecked with grey from his early thirties on.) His face ages gracefully, little in the way of wrinkles and more in the way of sharpening angles. he looks like an aristocrat, or a king from another time.
Nico took up smoking in his twenties, for a few years until Will managed to convince him to stop. He gets a few tattoos - one to remind him of his sister, one as a reminder of the hardships he survived, one for the new family he found.
Campers look up to Nico more than he ever expected them to. He teaches a few combat classes alongside Percy, but he’s not always around. He still travels back and forth and all around the world, sometimes bringing new demigods with him, sometimes news from Camp Jupiter. While he’s around more often, it seems entirely impossible to pin him down to one place. Some things never change.
Will is like everybody’s favourite grandpa. He doesn’t even look that old, it’s his kind and warm personality that has campers flock around him whenever he visits camp. He’s gone to New Rome to study medicine, the traditional way, and consulted a lot with his Roman siblings there. They’ve had so much to learn from each other, entirely different methods for many things, and Will comes back to Camp Half Blood to share his knowledge with anyone who’s willing to learn. He runs the infirmary for years, but he leaves for a few months every year for organisations such as Médecins sans Frontières (Doctors without borders? I don’t think that’s a thing in the US?) to help those in need as much as he can.
Will ages gracefully. Like Jason, most of his wrinkles are smile lines, although he grows grey fairly early on as well. His hair is light, though, so it’s hardly noticable until Will is basically white haired.