vampire

"Willa and her best friends, Val and Fiona, love ninjas. They have matching ninja backpacks and ninja t-shirts, and they play Ninja Club every day. But Willa knows she's very different from her friends. When Val plans a sleepover for her birthday, Willa is excited--and nervous. The sleepover is on the night of the full moon, which will reveal Willa's deep, dark secret"--Provided by publisher.

The minions start working for Dracula.

When Miranda's guardian angel Zachary recklessly saves her from falling into an open grave and dying, the result is that she turns into a vampire and he is left to try to reinstate his reputation by finally doing the right thing.