(I actually had to look up the meaning and synonyms of the word intimidate to see how much I could get away with in this. I was trying to think of different ways someone could be intimidating. xD) 

Noctis: 

His crush had started in high school. 

They always had the same expression on their face. No matter what anyone did. It was always a look of disdain, anger, or disgust, he could never be sure which. They never spoke either. It was kind of scary. And they fact that when they walked the halls, they did not just jump out of the way like most people did for him. No rather they’d stare him down until he moved an equal amount for them to both walk through the hall. Honestly, their presence in a room was very commanding, and almost screamed for everyone to just LEAVE THEM ALONE.

He was smitten though. His friends questioned this when they found out of course. And all of them asked why them. Was it was their eyes? The graceful way they held themself? Maybe their calm and cool demenor? No matter what they’d ask, he’d always say no. And the answer, when he finally gave one, surprised them.

It was their smile. 

He’d only ever seen it once, but that was all it took. It was when he was passing through a park, on one of the very rare occasions he’d ventured out alone without telling someone. He’d happened to hear a dog barking and happened to look over to when the source of the sound came from. To his surprise, there they were. Chasing after a dog and smiling to themself. He didn’t want to bother them and ruin the moment, so he left them alone and went home. But the smile stuck with him. 

Eventually, he worked up the nerve to sit near them and start up a conversation. His brain stalled at the startled expression on their face, and the soft kind voice that came from them. They were very animated he realized, as expression after expression crossed their face. And then they frowned, which was actually more of a pout, when he said that they always looked angry. 

“What? No! I’m not always angry. I just always have my face relaxed.” As if to make a point they relaxed their face and their usual expression fell into place. It clicked in his head then that they just had a naturally grumpy neutral expression, and laughed. 

It was the start of another wonderful friendship. (And their smile still made his heart skip a beat.)

Prompto:

He only ever saw them when he went for his run. It was almost habit. It’d been years since they’d first saw each other, and there was something of a silent respect between them. When he’d first started running, other runners would sometimes stop to help him correct his form, or the encourage him. A lot of his social skill were learned from all these bright runners, who rose and ran at the crack of dawn and evening’s twilight. 

But they? They never stopped for anyone. Those who tried to help them, and those who needed help. it didn’t matter. They were so focused on themself they just didn’t have time to get to know the others. They were cold. Distant. Anti-social. And they ran like the devil was at their heels. He couldn’t help but admire them, even if he knew they’d never look his way. But the others? They worried endlessly for someone so isolated and focused. Any attempts at talking with them was often met with cool silence.

Through the years, very few facts about them had been revealed. They started running around the same time he did was one of the few he was aware of. They were fast, frighteningly so, was another. And as if to make it a point, they’d try and pass everyone at least twice on the run around the park. (And they often succeeded.)

However, one day, Prompto, in a rare fit of confidence, wanted to prove himself to this person he’d admired for so long. And so, when he heard their telltale foot steps behind him, he ran faster. And when they sped up to try and run past him again, he once again increased his pace. Soon, they were both full on sprinting around the park. When they did managed to catch up to him, pacing it just so they were running side by side, a wild grin lit up their face as they both pressed on.

At the end of their run, they turned and offered their hand to him, introducing themselves at last. As he’d get to know them, he’d find out that their attitude and demeanor wasn’t meant as a slight, but rather that they just couldn’t afford to lose focus of their footing. Revealing very poor health that doctors had said would result in them being sickly all their life, they had actually rebelled against that idea. Running was their freedom. And Prompto was very happy to learn that their personality was just as bubbly as his.

Gladiolus:

Damn, they looked like they could kill a man. (And have probably.) They were someone important around the Citadel he could tell. The way they carried themself, they had to be a Marshall, Crownsguard, or Glaive. But he could never peg them for what they were. They gave nothing away. Their face was always polished smooth, like stone. Even in the middle of battle. But there were many people like that here. Heck, he was one of them. 

What made them intimidating was their allure. 

Something about them drew the eye. Screamed ‘look at me’. They were dangerously charming, and without effort. More than once, he’d seen someone stop in their tracks upon meeting their gaze, or even the most practiced speaker stumbling over their words upon making eye contact. And when they spoke, people listened. And there was never room for anyone to argue, not that they wanted to.

But this polished image, he should have guessed it was wearing on them. The day he rounds a corner in the citadel, and finds someone crashing into him, he’s deeply surprised to see the look on their face. Like they were lost. And he doesn’t even bother asking if they’re okay, not because he’s tongue tied, but because he recognizes the signs of someone about to break. He guides them away from everyone, to an area where he knows no one goes.

They explain that they’re in training to be a negotiator, and they have to be flawless and perfect, and charming, and they’re actually very scared and can’t even fight and- He has to cut them off and clam them down. It was actually a large surprise that the intimidating person that he liked actually had the personality of a bunny. But it was endearing. So he’d offer his shoulder for them to lean on, and they trusted him enough to be themselves. 

(He does, eventually, actually call them bunny to their face.)

Ignis:

Even though Ignis wasn’t usually one to be intimidated by anyone, this person managed it. How? They could vanish. Not really, but it seemed like it. They’d be standing next to you one second, and then gone the next. It was unnerving. Plus, they were quiet. Like a ghost almost. A lot of people thought they were kind of creepy because of it. They worked in the library, and would often be seen re-shelving books quietly and sticking to themselves generally. 

It would be when he encounters them outside of the library that he finds himself more than a little take with them. They, shockingly enough, live in the same apartment building. And when a small cat makes an appearance in his own apartment via the window, he’s a bit lost at what to do. It’s small, not quiet a kitten, but not a full grown cat either. 

That’s when he hears a small voice calling for a cat. He sticks his head out the window and then actually end up talking like that for a bit before they realize that it’s silly to be speaking from the windows. He scoops up the cat and takes it back to them, and that’s that. But it’s not. Because soon after, cans of ebony would somehow find their way into his things at work, and no one ever sees who it was. 

And he finds the gesture very sweet of them, despite their ghostly act.

(He’d never admit to leaving his windows open on purpose for the small cat to clamber though just so he’d have an excuse to talk to them and thank them.)