So last month my monthly RPG group got together, and as a group, created our player characters. This coming Sunday my players begin doing the bidding/work of an Inquisitor who does not exist yet.
So I am looking for tips on how best to create my group's Inquisitor. He/She should be fully fleshed out character (I'll come up with backstory and everything) including a full-blown character sheet.
As far as creation rules would go, how best should I approach stats, skills, talents, etc? I don't want him/her to be a god, but I don't want the group to be able to take him/her down in a fight right away, if things were to come to that.
Some background I have come up with is that this Inquisitor will mostly focus on Xenos threats, but will take up any case that requires the Inquisition's attention. I'd rather the Inquisitor not be a psycher, but maybe just the ability to sense psycher activity (psyniscience or whatever that skill is called (at work, so no book handy)). He/She will play fast and loose with the rules, at times, sort of an ends justify the means sort of person.
tl;dr version:
I'm making my group's Inquisitor, mechanically in the game's rules, how do I go about making a powerful Inquisitor character sheet?