Noctis:

He’d be absolutely APPALLED upon seeing his S/O take an ice bomb in full force on his behalf.

He hadn’t been watching himself as carefully as he should have, and had left himself unguarded. 

And Ice bomb had seen the opening and moved to get closer and implode.

But his S/O would have dropped their weapon and ran over, flinging him clear of the attack at the last moment.

They’d be covered in frost instantly, and drop to the ground. The very air they BREATHED hurt them because it was so cold. 

He’d rush over to them, fending off another attack before it could hurt them even more.

However, they’d be frozen where they had dropped, and start shaking uncontrollably. They wouldn’t feel like they couldn’t breath and everything would start to fade.

It was so cold.

Meanwhile, he’d have to leave them on the ground where they are so he can finish dispatching the enemies with the rest of the group. 

Once that’s done he’d rush back to their side and pull them into his arms. 

Ignis would tell him they’d need to get them to a safe area and raise their body temperature before it took too much of a toll.

They’d do just that. They’d get to a haven, strip them down to their tanktop and jeans, bundle them in blankets by the fire and Noctis would just hold them.

They’d hope it was enough. 

When they’d come to, they’d still fell cold, but alive. And Noctis would kiss them all over their face in relief, and tell them never to do that to him again. 

They’d dead look him in the eye and refuse. “Feelings for each other aside, it’s part of my JOB to keep you alive.”

So he’d retaliate by refusing to let them free of the blankets and his arms until they agree.

They wouldn’t mind, “I’m still cold anyways.”

Of course, then he’d threaten to leave them by the camp fire alone. 

Which, they reply they’re certain one of the other guys would be GLAD to help them warm up. (They’re joking but that only makes Noctis sullen and cause him to ignore them even if he refused to let them go.)

It’s be a source of tension. They’re willing to die for him, but he’d want them to live for him.

TLDR; He’d panic, but do right by them. He’d do everything he could to make them better, and when they are better, he’d make them promise not to do it again. However, if they don’t agree he will grow angry. But not at them. It’d make him want to strive to be better. So the next time he’s in a situation like that, his S/O wouldn’t have to almost die for him. 

Prompto:

He hadn’t seen the MT until it was too late. They had lunged forward for him, a diagonal slash ready to take him out of the battle.

But it never landed. His S/O tackled him out of the way, but in the process was struck themselves. 

The blow landed across their collar bones, much too close to the throat for his comfort. And they’d start losing blood. A frightening amount of it, and they’d be unconscious in seconds.

He’d press his hands to the wound to try and slow the bleeding and it does help some. But the blood would start to stain his hands after a while.

He’d start gunning like a madman, never leaving their side. Just pointing and shooting through his fear. 

When the battles over, he’d quickly call everyone over to see who had a curative. 

He’d pour the potion down their throat, and feel the skin knit back together under his hands. 

They wouldn’t wake though. The potion could heal the flesh but not replace blood.

So they’d camp for the night, and Prompto would wait for them to wake up after trying to wash their blood from his hands. (It’s stained there, and scared the shit out of him every time he sees it.)

When they wake they ask if HE’S alright.

His starts gibbering nonsense he’s so pissed at them, turning red in the face from frustration, and only managed to make one sentence come out clear. 

“DON’T DO THAT AGAIN.” 

And they’d laugh, high pitched and clear and pull him down into a kiss with them. “I love you too.” 

TLDR; He’d panic as well, but handle it. It would only be after they’re out of danger and recovering he’d realize, “holy shit, I almost lost them.” He’d find the thought so upsetting, he wouldn’t be able to make actual words come out of his mouth, only distressed noises. And he’d be angry at them. He’d think he wasn’t worth dying over.

Gladio:

He had trained to handle dangerous situations, and could withstand most things. But one doesn’t walk away from a fight with a coeurl unharmed.

When it casts lightning at him, he fully expected to be taken out of the fight by it. He was prepared for it.

But nothing could have prepared him to see his S/O step in front of him so calmly, and absorb the shock meant for him.

On someone his size, it would have hurt him yes, maybe even kept him down for a week or so. But on someone their size…

Their heart stopped dead in their chest and they fell to the ground.

He’d roar and end up fighting all the harder. And when the beast is dead he’d demand a phoenix down to bring them back.

And up the feather going up in flames, they’d inhale sharply and clutch at his sleeve. 

“You’re okay. You’re okay.” He’d reassure. And then he’d scoop them off the ground and carry them to their camp. 

He knew that no matter what he’d say that they loved him too much to let him be hurt. And he’d do the same. It was an understanding between them.

That didn’t mean it wouldn’t hurt him to think about losing them because of his mistakes.

TLDR; He accepts that their love will cause them to protect the other, and get hurt on the other’s behalf. And he’d fine with it. But he’d suffer mentally and scold himself over and over if he did almost lose them.

Ignis:

He’d usually so careful. He watches the other’s backs and heals when he’d needed. And as a result he watches his own back constantly as well. He can’t afford to slip up when the others rely on him.

But all’s it takes is one misstep. 

An MT assassin rushing up to him in a blind spot. He’d hear his S/O yell his name too late and brace for the pain.

But it never came. He’d look behind him and see his S/O standing over the defeated MT. He’d thank them, and they’d say think nothing of it.

It wouldn’t be untl after the battle he sees that they’ve been run through with a poisoned blade. 

They’d hang on just for him though, refusing to go unconscious while he administered the antidote first, and then pull the blade out and gave them a potion.

They’d be a shaky mess from how hard it was to hang on, but in the end he’d pull them into an embrace. He’d feel so guilty for letting his guard waver.

“everyone needs someone to watch their back Ig. You can’t be perfect.”

TLDR: he’d be the most stable out of them all, the emotions of almost losing them hitting him after they’re fully healed and out of danger.