Ding, ding, ding, we have a winner. It's Connor because, if I remember correctly, Iron Man's suits have a built in air filter, which would filter out the pheromones. I don't see why Connor would leave something like that out.
Good job, I was waiting for someone to point that out. Anthony's pheromones are made to affect beings that are either part human, or have been breathing Earth's atmosphere for years. There's one other person that is immune at time, I'm just waiting for them to figure it out.
John gets off the weight bench and wipes the sweat from his forehead with a towel. As he prepares to start, he notices a strangely familiar looking girl peek her head into the weight room. She disappears just as quickly as she appeared, so he shrugs and continues his workout.
Anthony finishes his breakfast and makes his way to the locker room to get changed out of his suit and into work out clothes. While walking to the locker room, he spots Sue quickly walking in the opposite direction. He greets her with a smile that would seems genuine, and says, "Hello Sue."