My name is Ryuu007 and I just joined recently. I was looking through your list of ideas and the "Angel among Vampires" piqued my curiosity and interest, so if you are still up to RP, we could do that one. However, I would like to suggest one twist to this idea. My character is a human who summons your character from Hyperion where angels dwell through a contract scroll that has passed down in his ninja clan for generations and the two steadily grow closer together. However tragedy strikes when, on one of their missions, they face a powerful vampire lord who bites my character, turning him into a vampire lord as well since that vampire seems to see my character's potential to be the greatest among the vampire lords. Of course, my character's clan does not approve of this change since the clan is a vampire hunter type group and they expel my character and yours from the clan, leaving them to fend for themselves as a young vampire lord and his angel partner in the world of vampires.
if this sounds okay to you, then feel free to reply to this message, my friend.