Secretly, she's a witch. But she's also dying. She was diagnosed with cancer. Her best friends can save her life, but he's not allowed to. She's a sweet, frail little thing. Ever since they were children they were inseparable. Her secret wish is to marry him, and find out why he's so different.
Secretly, she's a vampire. He made her one to save her life. They made it look like it was accidental, natural. There was candles lit and her stuffed animals surrounded her when they completed the task; they took it all away when she was "asleep".
Secretly, she's a vampire. She left her fresh grave and almost attacked her brother. Once she learned it was wrong, she almost starved. She jumped out of the car and attacked the nearest human. He had to cover her tracks.
Secretly, she's a witch. She has strong telepathy and she was able to call out for help. She even managed to fight off his cousin with shouts in his mind equivalent to explosions. She was able to say goodbye to her mother and step father even without telling them she was alive.
Secretly, she's a witch AND a vampire. She belongs in the Night World, even though they thought she was illegal. She was what the Night people would call a "psychic." She had real powers, but didn't know it. Turns out, she's perfectly legal. And has found hour soul mate. And. She's alive.