Nephew to Robert and Andrew, Seth’s relationship to the family is muddled by the fact that at a young age he was driven out following a row between family members that turned ugly (even for the Family). He hunkered down to wait out the mess in the wilderness around the ‘farm’ waiting for someone to come find him till long after it became apparent that no one was looking. He’d been forgotten in the aftermath of whatever set the Family upon itself and it was another week before he found his way back home. Still suspicious and more than a little crazed by now, he nabbed a few supplies and whatever belongings he most considered his then returned to the shelter he’d carved out for himself in the hills, learning on his own to subside there, and eventually to thrive, occasionally visiting the farm when things were hard enough to force him to steal from his own kin. It was years before he was caught in one of Robert’s traps but in some fit of kinship, he recognized the wild boy as family and Seth was adopted back in as their long lost nephew.
Seth ran away to the hills which had become more home to him than the people who had first driven him out, but returned a week later to share a kill he’d made in the forest, relishing for a short while the few creature comforts the homestead offered, but eventually returning to his shelter in the wilds. This has since become the norm, and a room is usually kept for the family’s wildest and most feral member, a young man of few words, fast hands, and a silent agile gait that makes him the best tracker and stalker of anything living around their home that moves on four legs or two.
Edit: My only concern is that Steven Strait may be entirely too pretty