"When she's not being a massive pain in the behind, yeah, I guess she's nice."
Apparently, there was history there, judging from the irate look of wounded teenage boy ego on Jack's face. "She's something like a myth biographer and historian. She deals in stories and knowledge and understands how the magic in our world works better than most. Anyone else who understands it better was already taken."

He went on, "Her name's Mary Katherine. But some of you might know her by another name: Mother Goose."