Board Thread:Wiki Discussions/@comment-10733658-20161106155157/@comment-94.0.181.217-20161107021527

Gender is psychological, sex is biological. Mutsuki identifies as a man as evidenced by much of his character development. What your describing has little in common with Mutsuki's situation as it sounds like some kind of club activity (bit of a strange example tbh). Your situation makes it clear that it's all just a game whereas Mutsuki is officially treated as a man by the CCG. From Saiko's intuition it's safe to say that Mutsuki really isn't faking it, as stated above when Mutsuki revealed his sex to Saiko he didn't switch pronouns (he's still using "ore").

Back to my main point, gender is largely to do with how you view yourself. I think it's best to repect Ishida's work and refer to his characters in the canon way because it seems odd to read Tokyo Ghoul without following the story.