This comic is basically the result of me having thought of the first two panels and wanting Charlotte and Grace to talk about something before Mr. Verres showed up.
As for how strong Grace can get and what this means for the hypothetical fight brought up in a previous comic commentary between her, Angel Nanase and Cheerleadra, I'm not sure. As she says, she can make herself stronger, but it makes her more sluggish, too. So, in summary, this information is of absolutely no help whatsoever. HOORAY!