I have two main characters with different stories (sort of). I am absolutely in love with my female character and her plot, and her parts are really easy to write. My other character isn't interesting enough, though. At the moment I have him as: a man in his 30s, a cop, gets along with pretty much anyone, very easygoing, doesn't really have any close friends (maybe because he had a best friend when he was younger, but s/he died and now he's afraid to get close to anyone). I am setting him up with my female character's sister who is pretty spunky. I don't know what else to do with his personality...I feel like he really needs something else...unique. Any ideas?