I would imagine races could be either Imperial, Altmer, Khajiit
Lord Stone as you wont be wearing much armor.
Armor wise, clothing with heavy bracers or theives guild armors boosted with alteration.
Possible Skills:
One handed blades only up to paralyzing strike (if doing dual wield sword main hand and dagger off hand)
Block, whole right side with reflex increase.
Stealth, up to backstab (no assassins blade) and take the max perk for a duck and weave style of combat.
Illusion would be cool
Restoration for healing
Smithing to keep your blades sharp
Last take alteration for flesh spells and paralyze.
Shouts, disarming certainly, elemental fury or slow time
Thoughts or suggestions?