Ambrose Tressler is the middle child of the Tressler Vampire siblings, but he usually acts as if he is the oldest. He’s always chastising Nikki for her childish behavior and is overprotective of his youngest sister, Lucy. He tries to ignore his vampiric instincts and believes that vampires can live peacefully among humans, without killing them. Still, he is naive and optimistic and perhaps too much so for his own good. He has joined Cheer to assimilate into Parkers Canyon High, but his family may not be as inconspicuous as he believes.