I have a lot of those, so I'll start with a simple one.
Maxwell "Leadbelly" Charles
Class: Pugilist Fighter
Weapon: see Fist of Gratia from Bloodborne
Race: Half-Giant (Hill)
Looks: Ugly bastard; like Dampe from Ocarina of Time with the bald head, crooked teeth, and hunched back, but really muscular. A patchwork of six scars on his stomach from an altercation at his parents' tavern where he was shot.
History: Lives on a farm with his Hill Giant dad and human mom, mostly doing grunt labor and occasionally helping stock the tavern with heavy barrels of wine and liquor. A customer once goosed a serving girl and friend of his, so Max slugged the guy in the jaw and he was shot in retaliation before running away. The bullets are still in there despite clerical healing, earning him the nickname "Leadbelly."