Rowan Milani is an assassin for the President.
His day job, which he does do quite a lot of when not on special assignment is that of an FBI agent. He is, from all accounts, good at being a special agent and for the most part enjoys it. He is, though, exceptional as an assassin whose main target are terrorists out to hurt Americans.
Milani is a natural-born American, the son of an Iranian immigrant and a feisty woman of Italian descent. Though both ethnicities could give him a swarthy complexion, he definitely leans towards the Persian side which helps a great deal when he needs to infiltrate an organization but causes some trouble for him because of the backlash against Muslims.
Based on the reaction of several women to Milani, he is quite handsome and possesses a powerful magnetism that makes them pay close attention. When his charm and natural inclination to flirt gets thrown in, he adds to the situation which is good for his libido but sometimes not so good with his professionalism. (Still, not a problem in my opinion.)
Something that is a problem, though, is his frequent and some times extended absences from his FBI work while on special assignment for the Chief Executive. Since that work is all extra-legal and therefore hush-hush, it is known to just a couple of people. One, naturally, is his supervisor in the Bureau who can make sure his disappearing is "excused" but that in no way stops his fellow agents from wondering and from being either extremely jealous or downright suspicious and resentful. While he has a close friend or two in the department, he has more than a few detractors.