Sky wasn't ignoring Knox this time so much as she was weighing her options. She was pretty sure that the fact that Headmistress Truebridge wouldn't tolerate events tarnishing her reign at Hogwarts keep her safe. Plus there was her familial connection to the Ministry which the professor knew well enough about. Nope, she was more worried about ending up being taken out of Quidditch before she even got to play. Which explained what she did next. "Accio robes!" They flew right to her out stretched hand. "Scourgify!" What, she wasn't going to wear dirty robes. Nope.

Anywho, she practiced making the 'S' shape with her wand. Begrudgingly. Because she still didn't think that it was right that they were being treated as free labor and moneybags. "Poliotus," she cast, making the 's' shape. Her desk became supershiny.