Luka was sent to Earth by God to find a human male with long purple hair who is about her age and protect him with her life. She can some times go crazy due to the fact that she was poisoned with demon blood when she was captured and the demon who caught her fell for her. However she killed him and continues her search for the purple haired male human while working at a maid café with her sisters Miku, Meiko and Rin. They also live with Rins older brother, Kaito. (Sorry I prefer Luka over Rin so I changed Characters. ^.^)
Violin or instrumental music.
some country pop rock metal and such (not really rap but I don't think it's useless or what ever. I think it's okay I just don't really listen to it too much.)