"Yes, I'm betting to believe there is," Jack noted wryly. He had sometimes entertained the notion of asking Ms. Menides if it were possible to read private messages, but he knew that was a terrible slippery slope. As much as it would enlighten the faculty, you could not protect the students from everything, least of all themselves.
"Blake is territorial," the banshee agreed, "but he's also authoritative. With Wendy, the power relations are very clear. Wendy has been cowed by Ms. Menides, which makes him listen to Blake. Their roles are clear. Their struggle is not to see who comes out on top, because that is obvious." Jack gave Cressida a significant look. "It's only when people challenge him on his own turf that he becomes territorial." And annoying.