"Beware the man in red with the hammer, who walks alongside mutants."
So, I started off this character as a guy with literally one Health Point, hated by everyone except for Super Mutants and Feral Ghouls, and with the cannibal trait, without any starting items. And I mean, NOTHING.
He survived! How? I don't know! But I developed him a lot, so much, that he somehow beat a raider boss, got his armor and overpowered super sledge, and is now an absolute beast to deal with at just level 21.
He does have a basic backstory...
Basically, he was a raider, grew up a raider, etcetera, but was eventually kicked out due to the raiders in that group saying that he was too weak. He survived on his own, and was eventually taken in by a Super Mutant for some reason, and they taught him how to eat other beings of his type, and also trained him... In special, super mutant ways.
And so, after a long, long time of living in depravity, he was coated in the scent of death, CONSTANTLY. Even to the point where Feral Ghouls were just like "yeah okay lmao he's just like one of us or something" somehow. Which helped Super Mutants sometimes, because staying near Feast'ah would protect them too from feral ghouls.
Eventually he came back to the group that kicked him out, and he was kicked out again, this time, beaten to one Health Point, and everything stolen. So, yeah. That's kinda where the story starts. Maybe.