I'd prefer to have him as a boss (preferably second to last, as Vali is the son of Odin). His mug would be something like a combination of Brendon Reed and Georg, who would have less helmet and horns longer and made of ivory (but not to the point of it ruining the mug or being completely ridiculous). Scars would be very visible, and around his neck I'd like a norse pendant like the (http://www.ragweedforge.com/5114.jpg), but if there isn't room to display it properly or well then cutting that out is fine. His sole purpose of birth was to kill Höðr (lolwhore) so if he could kill a minor character girl, or any girl, that'd be good. But of course, you can incorporate him into the story however you like. I think having him kill a girl called Höðr could fit the theme. Preferably he'd be pretty strong, and pretty tough, but you can change his stats to fit the game better, or to make him a human controlled character. For personality, I honestly have no preference for the archetype he falls under. His character would probably fit badass or "boss without much personality" but I know you want to have humor in it, so if possible give him a dry, sarcastic humor. Or just don't have him talk much.
Berserker
LVL 18
HP 76
STR 30/30
SKL 23/29
SPD 27/28
LCK 10/30
DEF 18/23
RES 14/21
CON 17
Weapon: Mjollnir, range 1-2, MT 26, WGT 20, ACC 85, CRIT 0, 15 uses, rank S, proof, or A.
If he isn't a boss and becomes playable, then make him have an insanely high strength base, but with a low skill and speed base, below average defense with a decent growth, average/low resistance, and High CON. I'd like his growths to be good strength, good skill, good/great speed, good enough defense, and average resistance for a physical unit. Oh, and low luck in general.
Anything you'd like me to change for you?