We haven't interacted before, but I'm still happy to toss some ideas at you! This guy here works for the Ministry, he's a Metamorphmagus who specializes in infiltration. He graduated Hogwarts in '04, so perhaps they crossed paths at school?
My other one is ~videre, one of the Llywelyn ginger clan. He owns a tailor shop and sells/trades dark artifacts out the back. Nice, polite guy. Just don't hurt his family.