Aya Dunn her family murdered. She is sent in her brothers place to protect a vampire prince. Aki Dunn is Aya's twin brother. He has a weak body and would die if sent to vampire so they switch lives. Cid RavenWood a evil vampire prince that shows no mercy. Hates humans. Kills anyone he thinks is worthless. Vincent Ichimaru a werewolf who likes Aya and discovers her secret and her identity while working for Cid.