This is Preston, a fellow Foxtrot. He's an energy replicator and can borrow most people's powers temporarily and he can read energy from supers. So he can see not only their type of power, but can also tell when they're in love, aroused, etc.. He's a former military guy, but it's a little sensitive, so he wouldn't be a jerk if he got hit on. He'd probably laugh it off and tell Valentine that he wasn't that attractive.