Meg again and this is my third, I PROMISE I will be better with the intro's next time. Really I do.
Meet Kieran Flint. He is an Irish-American wizard who fought in WWI with the Americans. Prior to this he was moving up in the Irish Gang system in New York City - primarily in Brooklyn. After being injured in the war he met Lottie and convinced her to come back to the States with him. With Prohibition and the Italian and Jewish crime families moving in - Kieran is coming back to London to establish his 'businesses'.
He tends to run bars, brothels, and provide 'protection' for businesses that feel that they need it. he also has been known to deal in the trade and transfer of less than legal or restricted potions and items.
Had he gone to Hogwarts he would have been in Slytherin - cunning, the ends justify the means and very determined to end up on top.