Azurite's buddy seems like the kind of gal who has a secretly terrible family, turns into a monster after issues from said family peak, gets saved by the mahou shoujo, becomes a mahou shoujo herself mid-season, has better weapons and powers than the main duo, does cool shit for three episodes, and then becomes irrelevant for the rest of the series except for jobbing and the occasional spotlight episode. She'd be in that middle territory where she's not number two and the technical deuteragonist and girlfriend of the lead, but also not one of the numbers four onwards, who tend to be interesting and experimental and morally complex.