If your interested, this is what I have in mind. Backstory: without her knowledge, a young woman fell in love and married a handsome vampire male, to whom she'd birthed two children. A human boy and a vampire girl. When she had learn of herself marring a vampire and had bared a vampire child, the wife became enraged with disgust so thusly came a brutal divorce, as it was agreed that the son is to with his mother and the daughter is to be with her father. However it was difficult separating the two siblings because they share a deed bonded with each other and refused to be separated, so at that the both the brother and sister were forced to have their memories erased. The brother had forgotten everything about his sister, but his sister remembers everything about her brother, no matter how many times she's had her memories erased. In the RP the two siblings reunion when meeting each other in high school and become roommates. This makes an interesting role-play considering that the sister is trying to help her brother regained his last memories, while the brother learned she is a vampire and tries to keep her secret while keeping this secret from her. So what do you think?