That is neat and all about the guy from ORC. But I can and will assure you that Piers is NOT gay at all. He used to be a character with a huge sense of humor and very playful. He became very battle hardened during the events of The Marhawa Desire. He was in love with a stubborn woman named Merah Biji and she sacrificed herself to save Pier's life. After the mission she promised him the date that he wanted for all the years he liked her since they first met. Where Pier's was the best sniper in the B.S.A.A American Branch. She was the best agent in the East Asian branch.
Pier's is a very deep character who Chris saw as his successor the moment he took him under his wing not long after the events of RE5. They are VERY close with each other and Pier's saw Chris as a father, a brother, a mentor, and a friend. After the death of Merah, Piers shut himself out and became distant to everyone except Chris. He lost himself and became a very determined soldier, perhaps even more so than Chris. Chris also often commented that Piers is more skilled than himself and has more potential than him. Piers believed that Chris was the best dispite this. Piers always puts others before himself and is as selfless as they get. He also believed he should have died instead of Merah. This is something that effected him emotionally and he blames himself for it. In many ways his sacrifice allowed him to be with her again. On the flip side he was to be Chris's successor and I have a feeling that Capcom intended Chris to die instead of him but lost the balls to go through with it. His character was developed perfectly for such a scenario.
Suggesting Piers is gay is probably one of the dumbest assumptions in the whole series considering the man he became in RE6 is literally a result of Merah's death. The woman he loved. Chris on the other hand has never shown a sexual interest in woman in the whole series. He's either asexual or gay. I would say he is gay because, despite being alternative costumes. He always gets a costume that is considered gay and in Revelations Capcom gave him the gay sailor outfit. A man wearing a sailor outfit in Japan is the equivalent of a guy at a gay pride parade wearing pink and rainbows.