Fayar's was born as what is known as a "stray" heart devil. A "stray" is a heart devil who lives deep into the cave systems of the Domain of Luxie, not part of any household and with no master. They live mostly in solitude as not only is the cave systems large and hard to navigate, it is also dangerous to stay around other heart devils as food is sparse.

Fayar's upbringing was quite unusual. Normally, heart devils leave their children as soon as they can plausibly survive on their own, however Fayar grow up not just with his father who was a stray like him, but his mother came to find them every now and again. As she had a master and household, she could only come find them once or twice a year and she couldn't stay for long, but find them she did without fail. Instead, Fayar's father was the one to teach him most of what he came to know and he did his very best to keep Fayar safe until the day he died. The most valuable skills his father taught him were the abilities to read others emotional state, how to calm others down, and how to temporarily disable others as harmlessly as possible. These three skills allowed him to later find, and most of all keep, pleasant company which else was hard to come by.
Fayar's father was generally a calm, but distrustful person. He was sceptical of most and careful with everything he did, something which had granted him his own survival for several years. He especially trusted no one who had a master, with the one exception of Fayar's mother. Fayar kept in his protection for many years, following in his shadow and learning from him until he became skilled enough to safely help out with any tasks his father may need to do, such as gathering food or avoiding aggressive confrontations with the few other heart devils they met.
As Fayar came of age, his father helped him identify good partners and what to do if anything went wrong, something that saved Fayar many times. It was then that he was allowed to do a lot more on his own, such as go explore without his father in the places that they stayed at for more than a day. It was, however, incredibly nice for Fayar to always have the security that his father would come running if anything went wrong, as it allowed him to try and fail at different things without the consequences being too much to scare him off.
The rare times he did see his mom he remembers mostly fondly. A cold and stoic woman of few words, yet with incredibly warm hands and a calming aura to her. There was something about her that allowed Fayar to feel safe and secure in her presence, and falling asleep by his parents while listening to their voices was one of the best things that he could imagine.

In comparison to most, Fayar had his parents for an incredibly long time. It was first in his mid-teens that he lost them, or rather, lost his father and never saw his mother again.
The master of his mother's house had become fed-up with her leaving, or her fondness of his father, or something else. One day, the master came along with his mother and some others, and shattered Fayar's life up until that point.
Sensing that something was wrong, his father had sent Fayar away in good time so he could go hide in the rather large space they were staying at. When his mother came, it proved to have been the right choice, as they quickly found his father. The confrontation was long and brutal. That day, Fayar witnessed his mother being forced to tear his father to pieces, but not before his father managed to bite over the master's tail at the start of the entire thing.
It left Fayar shaken and horrified, glued to the spot until another heart devil who had been hiding nearby saw him and pulled him with them, away from the terrifying scene. For a few days, the stranger cared for him. Why, Fayar didn't know, and neither would he ever come to know as they left as soon as he started to get a grip on himself again.

Alone, shaken, and with a new trauma acquired, Fayar tried to move on. He followed his father's teachings as best he could and it kept him alive. Yet, the scene of that day would haunt him every night for weeks whereafter it slowly haunted him less and less, though he'd never be entirely free of it. It didn't help that without his father he was complete alone for the first time in his life. He did his best to find other heart devils whom he could be around from time to time, but he could never stay with anyone for longer periods of time.

The years to come were rough, but somehow, anyhow, Fayar managed.

For several years did Fayar manage to stay alive and keep going, despite not finding much noteworthy to do with his life. But that, too, would come to an end. For worse, then for the better.

The maker of the heart devils, the versai Enu Luxie came to find him and took him back with zhem. Fayar knew, from the few stories spread amongst his kind, that zhe had sentenced him to die. No one survived an encounter with zhem, not for long.br> Fayar, however, was one of the unlucky few whom zhe'd use for zhes own gain against the world, and so he had days, instead of hours, to live. Zhe made sure he was cleaned up, dressed, and made presentable for the best heart devil standards, before taking him along to prestigious event. One zhe didn't brief him on other than the fact that people would look at him with disdain, and that no one would come to his aid if anything were to happen to him.
The event was known as a grand yearly ball for all of Krakrasien's big personalities, and the amount of people there were astounding and oh so overwhelming. He was given one full day and night to roam free, unbothered by Luxie, before zhe'd come for him. Knowing how short his remaining time was, he felt numb to the else overwhelming situation he found himself in and began simply roaming and observing people. Like zhe had warned him, people paid him no mind, and should he try to interact then he was met with spite, disgust, and general disdain. While personel of the event came to anyone else's help should a fight break out or such, no one came to help him, even if people got physical. So he didn't bother.

At the dawn of the second day, as his immunity had worn off, he did his best to stay invisible in order to not be found by Luxie. Even if he knew it was futile, he just wanted a moment more. Just an hour more of life. Yet, all his precautions were thrown out the window as he spotted someone in the crowd who caught his eye, and it suddenly became clear for him what he wanted to do with the remainder of his life: Stay near and observe this person. But it wouldn't go quite like that.
It came to show that the person that he had taken a liking to was Viel Irencet, a kind-hearted, determined, and gentle individual and a person Fayar ended up causing a lot of issues for. When Viel's beloved Mavis Magedon tried to shoo Fayar off even if he desperately tried to stay, Viel took him under his wing instead and refused to hand him to Luxie once zhe came for him. This action, in turn, started an entire chain reaction. Luxie got furious and did something to Mavis which made him go berserk specifically towards Viel, and that in turn angered a much stronger being; Lutesio Pavilae. After threatening Luxie and making zhem leave, Lutesio allowed Fayar to stay with them, to Viel's delight.
Fayar couldn't believe his luck. He had been granted more time, more life, and a place to at least temporarily stay with people who protected him for no reason that Fayar could discern other than kindness. Yet, it came with a price.
The event had caused Luxie to overstep an old warning from Lutesio, and Lu was now determined to see the consequences through; a war with Luxie. Fayar understood little of it, but he understood that his action of wanting to observe Viel had ended up triggering a cause for mass distress and furture destruction. A consequence that was so much bigger than himself, and yet it was all his fault. But even so, he couldn't get himself to regret the choice, as that meant regretting his new salvation.
To top it all off, Viel and Mavis even gave him the name Fayar as he up until hadn't had one, aside from one Luxie had given him as a mock name, as it meant "prey" in their native language.