consider my brain rotting

he'd appear reckless but have a lot of control over what he was doing, even while appearing like he didn't because of how insane some of the stuff he would do was

he would be a talented fighter, having only used his claws and teeth before, and once trained with weapons he would be DEADLY to anyone who crossed him for any reason at any point. With his ability to hide, slink around unnoticed, and focus on survival without a fear of death

and he works from the ground up in regard to his attachments to the connections he finds once he's out of the abyss

All of his habits are formed from his youth of being alone, and having no concept of what family or connection was meant to feel like, other than the fact that he lost his. His attachment style starts at NOTHING, as everyone is an enemy to him,

He ended up escaping when he was in his early adulthood, and only luckily found an exit after losing his left arm and leg to a fight he barely ended up making it out of after blinding his attacker and getting away.

He survived off scraps, and when he got big enough, he would kill beasts and eat parts of them to stay alive etc., and would eat anything he found to be edible down there just to continue living.

over the years he'd see the odd person come down and then disappear again, but he wasn't sure how they were doing that or why he felt drawn to them - the reason being they were vaguely shaped like his mother, or at least moreso than any of the other things in the abyss.

He had to learn the rest himself, and there was no point to him learning language anymore with no one to communicate with.