His One Unique Thing is fairly simple: He's the Trollslayer of Ashenvale. Basically the local hero of a gnome village, and because gnomes normally aren't into fighting (I think), the fact that he led a guerilla war against this troll named Urgaden and his band of goblins (and won!) for me makes him fairly unique among his peers. Since then, he's been going places, from Axis (where he's been all but banned from the First Pawn because of his nasty habit of starting bar brawls) to Forge (where he spent years learning how to work the smithy from Shivoln Thunderbellows, Fifth of the Twelve Grand Blacksmiths of Forge). His finest work so far is his schiavona, which is a basket-hilted broadsword that's perfectly balanced for his size.
(How he became an apprentice to Shivoln is another story to tell... a story that usually results in a bar brawl when overheard by others.)
He has this habit of gathering trophies from his victories in combat. He once slew a dire rat and turned its head into a skull cap, and after spending days harassing a giant beetle to death (literally), he fashioned himself a crude armor out of its carapace; he later on improved on it during his training under Shivoln, allowing him to use it as if it were plate armor. And as for his most prized victory (Urgaden), he used his facial skin to craft a leather shield that he proudly wields in battle.
Since he's been going about on a vendetta against trollkin especially, I felt it was natural for him to have one point negative relationship with the Orc Lord. Because of his association with (and training under) Shivoln, I thought it best to give him two points conflicted relationship with the Dwarf King.
I've gotten just about everything tied down I think :)