well, that helps a lot. it's not entirely a romance. and it will depend on how you and Ren wish to start off, as roommates or as individuals cast into the fire together in the chance meeting of a vampire. the usual thing i have for Dart, at least starting, is he is either out hunting for blood, or socializing at the bar. the Genre is Sci-fi/Sci-fan. a little magic, the supernatural, the occult (not touching into many true religions, no worries). i like a bit of action, suspense, and romance to round things off. while there will be a close relationship between the three main characters, it's not all about the bed-sports. conflict, adjusting to having a vampire in their life, if you choose to have your character ignorant of the supernatural, having to adjust to a situation that may not have come about under normal circumstances (an M/F/F relationship, living with a vampire, ect). perhaps one or both of you end up in a situation where being turned into a vampire is the only way to save your life (this can be early or later in the storyline, depending on what you two want to do.) i like to add liberal doses of comedy to any RP i'm in, so little one-liner comedic moments are prone to happen with me.
some back story on Dart, if it would help. he's a three thousand year old vampire. he's been alone his entire life. not to say he hasn't had his share of lovers and whatnot, but he's still alone. he's never turned another person into a vampire, because he's never found anyone worthy. it's not that he isn't looking, but he's very critical. smart, quick-thinking, like minded women draw his attention like moth to a flame. they have to be cultured enough to manage in white-collar society. he is extremely wealthy after-all. he spends most his nights alone, because he is getting tired of meaningless one-night stands and women that do not challenge his intellect.
please, ask me any questions you want. i will be happy to answer so we can have a good, solid start once Ren is approved.