Deal! Then here's his backstory:
Gavin is the half elf son of a noble. We can work out who his father is, you know your world better than I do. It was rather a scandal when his father rescued the Avariel maiden, fell in love with her and married her instead of one of the other human noblewomen he was expected to. But he chose to marry out of love, and he always did have a romantic side to him. He loved her free spirit, and she was captivated by his charm.
Their son was born with the wings of his mother's people, only instead of white, like his mother, they were brown, like his hair, inherited from his father. However, he took after his human side in his size and weight, which posed a problem with his ability to fly. His bones were not as hollow as they should have been to be able to fly, and while most Avariel can fly before they can walk, he could barely glide for most of his life.
As he grew up, most people politely ignored his brown wings, at least to his face. Away from him, however, he was regularly the talk of the town. Some looked down on him, others tried to suck up to him, but all treated him differently.
Gavin hated their attention. He studied and learned what his father wanted him to, but he had his mother's free spirit. He wanted adventure. He began reading stories at a young, young age, and would sneak out to the local taverns to watch the passing minstrels and bards as they entertained those people who were to one day be his subjects. He would meet them whenever he could, learning what stories they had heard, and even how to play a few instruments.
At the age of 12, his mother died. She had been healthy, but over the course of a few weeks, her health deteriorated rapidly, until she couldn't even rise from her bed. She was gone soon after. To this day, nobody knows why she faded. His father was pressured to remarry, this time to a noble woman who was more acceptable. It was a marriage of convenience, Gavin knew, but he still felt betrayed. The woman quickly conceived and bore a child.
Needless to say, Gavin was devastated. His mother was the only other person around like him. She had never seen him fly, though she had tried to teach him from the age of two.
At this point, Gavin started training. Hard. He made himself stronger, working his wings constantly, until they burned with the effort. He would glide with heavier and heavier weights, practicing day in and day out. It took four years of constant training, but he could fly. He would never be as graceful as she had been, but the people in town would often look up and see the young nobleman soaring overhead on warm days. This constant training built his core body strength to unbelievable levels, and as he grew into manhood, his strength grew with him.
During this time, he also studied with the minstrels in town, learning to appreciate the beauty of music and life. As he got older, he got his father's personal bodyguard to teach him swordplay, using the great sword to maximize his newfound strength. He trained until he was able to fly reliably in full heavy armor and gear, and had special armors made to accommodate him as he grew larger.
Technically, Gavin was the heir, even though his father now had other children with his stepmother. But Gavin didn't want the title. He wanted adventure. He wanted to go out and see the world. So one day, he packed a bag, put on his armor, and left, flying so there would be no one to track him. He didn't even say goodbye.
Over the years, Gavin has traveled from city to city, honing his bardic skills. Many people want to come see the half-Avariel Bard play his Viol or his Flute, as it was a beautiful sound to hear. But he began to chafe at only telling stories of others and their grand adventures. He wanted to tell of his own adventures. He wanted songs of his exploits to be sung by bards across the ages.
Outwardly, Gavin is charismatic and suave. He keeps his armor immaculately clean, and has a grin that aggravates most of the populous, because it gives them the impression that he knows something they don't. While he did leave his father's house, he is not above using his father's name to obtain better accommodations, and keeps his scroll of pedigree with him at all times. No doubt his father knows where he is at any given time, but he has not heard from him in some years.