Oh, if you do run, a concept I once made for an Angel game that never went anywhere that I wouldn't mind reviving:
The short version:
My notion was basically an alchemical construct made by an elderly, half crazed, somewhat excommunicated from the Jesuit order monster hunter to continue the good fight for him, off of the same notes of Albertus Magnus and the like that Victor Frankenstein would use to make his monster, only the fellow in question is more whirling cogs and gears, strange metal alloys and chemical compounds under an equivalent to flesh woven over them than stitched together parts. He's certainly good at the monster hunting, and has learned at his father's feet, but that's /all/ he's learned, leaving him with just slightly better lack of social naivete and awkward interpersonal relating skills than, say, the Buffybot. Or Anya. And similarly as out of place cheerful.
Using the robot quality and such.
The long version:
History: Had anyone ever heard of it, Henri Guiscard's career of battle against the darkness would have been a thing of story and legend. A priest of the Jesuit order, schooled in secret lore and techniques, he fought with dedicated intellect and skill against cultists, monsters, demons and the like. But such shadow wars are concealed from the world at large, from those who would react poorly at best to such knowledge. Beyond even that, it was preferred that Henri's activities be kept under wraps for the increasing toll they took on the man. Hair prematurely shock white, explorations into knowledge the church deemed forbidden, and increasing, railing demands for more resources and attention given to the hunting of monsters. In the end, that of the Church that dealt in such matters felt they had no choice but to excommuinate Henri, before his increasingly borderline personality and methods became an embarassment, even a public embarassment.
Alone, aging, facing the inevitable end of his years, Henri at least had one advantage left. There was no one to get in the way of his wilder ideas. He had carefully gathered tomes of science and the occult, material and artifacts over the years. He studied long thought lost and supressed notes of Paracelsus, of Albertus Magnus. Of medieval alchemy both foreign and local. It was one of the ideas those bastards should have listened to him about. The body ages, the mind slows, and a man can no longer fight the good fight, but a machine, made in the image of man, as man was made in the image of God? Given life and thought and will? That could be a perfect guardian. That /should/ be a perfect guardian.
And labouring over cogs and gears and strange, sculpted metal alloy plating forged over them, synthetic compounds, principles of motion and clockwork secrets, and the requisite electric scream of "It's alive!", despite the gnarling of hand and form the decades of work brought, Alexandre was born.
And then, Alexandre was taught. To hunt, to fight, to sneak, to kill. Of his father's science, of the languages of men, of the truths of the shadowy world he would walk in to guard humanity, of the morals that should guide him in his work. Sadly Alexandre was taught.. nothing else. Henri, always a bit imbalanced, could now be called eccentric only as an extreme of charity. It simply never occured to him to teach Alexandre anything else. About how people relate, about the feelings that went with Alexandre's thoughts, about even basic social contracts.
Alexandre was certainly curious about such things, but his father made everything else seem so much more important, he was sure he could just figure it out later. Father was very busy, and always not feeling well, better not to pester him. And so instead, with a beaming smile at the praise he would recieve for it at home, Alexandre went forth and waged his father's war. He was smart, and fast, and strong, keen of perception and quick thinking, able to see practically in the dark itself and hunt what lurked there. And he was very, very good, he just couldn't really manage things like properly consoling victims in ways that didn't sound horrible. Or conversations without a bit of oddness to them. And he has yet to understand why people find it off putting when he's so cheerful. A smile is /clearly/ better than a frown, and what's to be sad about when he's good at his job, evil is vanquished and the day is saved? Really, he'd think someone would feel better to know their husband was torn apart by undead squid beasts than to think he simply skipped town with the local trollop (though admittedly, he did find the local trollop's body with his and the squid beasts, so they could have been intercepted along the way... okay, he'll just stop talking now.)
It's not that he's delusional, he's simply inexperienced in all sorts of things, to contrast with being very experienced at others. He certainly likes people, or he wouldn't bother using his self will to defend them, and would certainly like to spend more time with them, he's just very /bad/ at it.
Still, he was delighted to hear his father being contacted through some of his old allies and friends about an organization seeking those that would more actively give battle to the darkness in the world. His father informed them of Alexandre and his nature, and that he would be his gift to that pact, and Henri's personal vindication. Aside from a chance to make his father proud, it would mean he could interact with fellow comrades in arms! People who would clearly understand him as his boon companions, in ways that those without similar experience were apparently having trouble doing. Yes, that was clearly the exact problem to date. A lack of common experiences.
Qualities (20+10 from Drawbacks):
Robot, 5 pts
Attractiveness 3, 3 pts
Acute Senses (hearing, sight), 4 pts
Eidetic Memory, 2 pts
Fast Reaction Time, 2 pts
Hard to Kill 3, 3 pts
Natural Armour 3, 3pts
Nerves of Steel, 3 pts
Situational Awareness, 2 pts
Supernatural senses (eyesight) 3 pts
Adversary- The servants of evil, 3 pts
Mental Problems-Reckless, 1 pt
Honourable- 2 pts
Secret (Alchemical construct) 2 pts
Dependant 2 pts
Kung Fu 5
Languages 3 (Latin, Spanish, English)
Gun Fu 0
Repair (Mr. Fix-It)
Getting Medieval 5
Wild Card 0
Notes: the dependant is Henri, who's occult and scientific expertise is offset by his being infirm, old, and kinda not exactly all there anymore. I also went more the Kroenen route of being inhumanly speedy and deft and such than into sheer physical juggernautdom. And went into the sensory acuity some.