Headcanons and scenarios? Righto!
Noctis:
Honestly, I think he’d prefer adoption to having a biological child. One that wouldn’t have the burden of holding the wall around insomnia.
Perhaps he’s aware that he needs to have a blood related heir to the throne. And perhaps he and his S/O accept that and they’d consent to having one, either by their own body or by surrogate. But that wouldn’t stop them from going out a picking another child to love as well. It wouldn’t go over well at first, because an adopted child could contest the throne of the bloodline child. But they still wouldn’t care, choosing to love both equally.
The other three of the quartet would accept the child as his as well. Ignis would be fair and care for them both. Gladio would watch over each one, and honestly, he’d probably enlist Iris’ help in shielding the twins. Prompto would be listed as their godfather, and take his role very seriously by watching over them constantly.
Noctis would probably prefer a baby or a toddler. Someone young enough to raise as his own. He’d want them to know that they have been loved for most of their life by him. (Perhaps they get a child the same age as their own, and raise them as twins.) Gender doesn’t matter, and neither does physical appearance. (But honestly, he’d lean toward a child that looks like his S/O.)
Growing up, the child wouldn’t know they were adopted. They’d just think they were related to the S/O because of their similarities. It would be when they’re older, and there are whispers around the palace that they’d begin to question their lineage. Perhaps the careless whisper of a maid catches their ear when they’re in high school. Their sibling would try and reassure them, but they wouldn’t listen. From that day forward they’d start noticing little things about themself that didn’t fit. Perhaps they have freckles but no one in their family did. And where did their eye color come from? Why did their hair curl when no one else’s did?
When they turn 18, despite their twin’s begging, they’d go to their parents and demand an answer. And Noctis and his S/O would answer honestly and carefully, wanting to ease the truth onto their child. But once what they heard was confirmed, they’d quietly retire to their room and wait for the night. Upon night fall, I can picture they’d run away, leaving insomnia for a time. Just to think and try to figure out if they’re OKAY with the revelation.
After a few years, perhaps when they’re 21, they’d sneak back into the city and see that the top headline was the royal family’s continued search for their missing child. And while they’re distracted, who is behind them but the shield of the family Gladio. They don’t notice it’s him until he grabs them and literally picks them up and throws them into a car. It would only have been chance he’d been out and about that day, and part of him wanted to let them go, understanding the need to figure things out on their own. But another part of him couldn’t do that to Noctis. So, into the car they’d go, even if they’re kicking and screaming. (Honestly, they hadn’t planned on getting caught, they had just wanted to check things at home.)
They’d get to the palace and try darting out the door of the car as soon as it stopped but they’d smack right into Prompto who’d wrap them in a hug and refuse to let go. They’d see Ignis on the way to the throne room, and he’d laugh at how surly they look. (Clearly they were NOT happy about being dragged back here.)
Word would have been sent ahead to the royal family that they’d been found, and they were waiting to see them. And upon seeing them, yes, they’d act cold, but they’d be glad to see they all looked well. They’d have doubts. Why were they adopted when they already had a child. Did they love them like they loved their sibling? They’d be scared of these answers and that’s what kept them away.
But things would turn out find. They’d all go and talk it out. There would still be a rift between the two siblings because they left, but it would heal. And they’d realize that adopted or not, this was their family and they shouldn’t have doubted them.
Prompto:
He’d probably also prefer adoption. And his chosen age group would be pre-teens and teenagers. The ones who didn’t get picked, and were forced to grow up alone. He’d want them to feel like they were wanted, and worthy of love.
He’d talk it out with his S/O, or maybe his S/O brings up that they can’t have, or don’t want, biological children. Which would be fine with him. (Honestly, he can’t picture himself have a biological child as well.) And both would agree that an older child would fit right in with them. (His S/O ends up picking children that look like Prompto though)
Perhaps it’d be a struggle to get the adoption put through, because neither were home very often. (Prompto would often work as a photographer and have assignments that forced him to travel a lot. And his S/O would always accompany him.) And he wouldn’t want to just leave a child on their own either. He’d want to do what his parents never did for him and take them with.
But a life on the road isn’t ideal for an adoption, and they’d struggle to get approved. (Noctis actually might have to intervene.) But once they are they’d probably fall in love with more than one child. Which results in them adopting two. Which is fine! But not what they had planned for. But they take it in stride and it works. The kids love how nothing seems to be planned, as their lived before this were nothing but plans. And while it may take some time for the kids to think of them as parents, the first time one of them does call Prompto ‘Dad’ he’s in tears. Their home is big enough for all of them, and they highly enjoy being together as a family. It’s pure happiness. And then there’s their ‘uncles’.
Gladio offers to train them to learn how to defend themselves, because you never know right? But only one of them takes him up on the offer. And after a few rounds of sparring Gladio realizes having a blade in their hand was nothing new. They actually trust him enough to reveal that their parents had been a part of the crowns guard, and died years ago in an attack. Honestly, they only agreed to be trained by him because they were curious if they remembered what their parents taught them.
The second child has such a crush on Ignis that they actually start following him around. He just assumes it’s curiosity about his job and offers an apprenticeship to them, stating that they have a good head on their shoulders and would make an excellent adviser if they wanted. They accept after talking it over with Prompto and the crush passes. They actually do enjoy learning from Ignis.
Noctis freaking SPOILS them. Like, he doesn’t even have any chill about buying them what they want. Because honestly, MINI PROMPTOS. He ended up sort of spoiling Prompto in high school when he’d let him, so there was no WAY he wasn’t going to spoil his kids.
All three are currently fighting over who’s their godfather.
Gladiolus:
Honestly, he’d want children of his own. Buuuut. Perhaps that’s not a possibility or an option. He wouldn’t mind if that was the case. Adoption would probably be the first, and only, solution he’d consider. Besides, it wouldn’t be a big deal to him. He’s not the only child of the Amicitias. Iris can pass on the bloodline if it was that important. (Though honestly, there have been adoptions in the family in the past as well. Family is family, and he’d punch anyone who said otherwise.)
Anyways. He’d only want one child. And he’d want them to look like his S/O. That’s the only thing he wants. Otherwise? Age and gender doesn’t matter. His S/O would decide on a child that does look like them, a 5 year old to be specific. His S/O would take the lead in caring for the child at first, while Gladio figures out how they’re going to do this. He didn’t expect to be NERVOUS. But he’d fall in love with the child the first time he see the child cuddled up with his S/O.
They’d be a rather happy family, and Gladio would actually be a little over protective of them. To the point where he’d probably have them nearby him at work all the time. Iris would sometimes, just to mess with him, STEAL his child in the middle of a hallway. Like one minute he’d be walking down the hall, on his way to see someone, with little soft footsteps behind him. He’d get distracted by something for a few moments and continue on his way, only to realize the footsteps were MISSING.
Oh boy.
He’d kind of panic and look high and low for the little guy, having flashbacks to when Iris disappeared with Noctis. Iris would finally take pity on him and call him, letting him know she had tham. Catch her if you can, because she is in LOVE with her new Nephew/Niece. Eventually Gladio’s S/O has to step in and get their child back after a day of shenanigans with Iris.
The child would grow up loved, and fully aware that they’re adopted. They’re like, the kid who get made fun of for it, but fires back, “MY PARENTS CHOSE MEEEEE! Your’s didn’t get a choice.” which results in fights. Lost of school fights. And Gladio is internally thrilled that they win every single one. But has to scold them because fighting is bad. (His S/O totally knows he’s proud of his child for standing up for themself though, but lets it slide.)
This kid is also, FEISTY. Like, they’ll take a run at Gladio in a sparring session and will keep swinging even if Galdio has them held back with one hand. Also, this kid is a high energy nightmare. Think Calvin and Hobbs. But…Gladio and his S/O wouldn’t have it any other way. They adore them.
Surprisingly, Prompto is listed as the godfather. Which would have him reduced to blubbering tears. Because holy crap the SHIELD of the royal family would entrust his kid to him if anything happened to their parents. He’d be so honored. And lets be real, the only person who can keep up with the child is Prompto. Even Gladio and the S/O struggles with it.
Ignis would try and instill some levelheadedness in the kid during their lessons with him. (I picture Ignis becoming a sort of tutor for the royal family when they do start having kids.) Buut…Ignis is used to children who are QUIET and RESERVED. This kid gives him a run for his money every time they’re together. But he adapts and though he’s considered the boring uncle, the kid likes being with him all the same.
Noctis would try his best to keep up with the kid if he ever, for some reason, has to watch them. But this kid is off the charts in energy and he’d eventually have to call Prompto for help. Basically, Noctis accidentally spoils the kid without meaning to whenever they’re with him, simply because he CAN’T KEEP UP.
The kid mellows out as they grow, and taking a few note from Ignis becomes a MASTER statistician…which they use for pranks and traps.
Ignis:
He was adopted himself as a baby is my personal headcanon. He’s completely aware of this, and so when his S/O brings up adoption he’s all for it.
He’d want a younger child, but not too young. He and his S/O have time enough to raise a child, and they deeply want to, but not so much time that they’d be able to raise them from a baby. So they go with a child that’s 8 or 9. Old enough to manage on their own if left to their own devices, but young enough to be theirs. Appearance wise, Ignis doesn’t care. Honestly, he’d leave that up to his S/O. And they’d pick a child that looked a bit like Ignis himself to his surprise.
They’d spend time together, trying to see where each other fit in their lives. Ignis and his S/O managed to fit their lives around each other, and eventually figure out where their kid fits. Which, the kid is so sweet that they don’t really complain about anything. Which made it all the harder to figure out what worked and didn’t work. (Both were fully aware the child wanted to be perfect. FOR them. Because they didn’t want to go back to the adoption center.)
Eventually, they’d work in tandem. One would pick up the child from school, the other would drop off the child. They’d take turns taking the kid to work with them, spending all their free time with them. IT would be rare, but they’d make it work so that they’d eat lunch all together every once in a while. Dinner was always together though.
They all love being in the kitchen.
Ignis would be a little surprised that when they get older, they reveal they want to be an artist. But he’d support them none the less.
Gladio would be the cool uncle to them. They’re entirly unsuited for combat, but still insist on learning how to fight from him. Though he’d try and persuade them that Ignis or Ignis’ S/O would be the better for them to learn from. Because there was no way they’d be able to swing a greatsword like they wanted. But, a little bit of Ignis’ sassiness would reveal itself when they’re like, “Don’t tell me what to do” and promptly go for a greatsword to practice with.
Prompto would try and help them achieve their goal of being an artist. He’d be pretty big in the photo scene, and would use some of his contacts to try and help them learn the industry. They get a long fairly well. Prompto, true to form, would be a bad influence. Starting with the day they come home from his place with GREEN hair. (Due to a mishap, his own would be pink.)
Noctis and they would bond over one thing. Their hatred of vegetables. He’d give them tips and trick on how to AVOID eating the veggies in Ignis’ cooking, ‘Take it from me kid, I’ve been eating with him for most of my life.’
Ignis would never name a godfather, because he’d be so sure that he’d NEVER leave his child alone in the world.


