She isn't a plot device. She's going to be a major player in the upcoming polticial drama.
Nefcy wouldn't describe this series with "game of thrones but without the sex" as a joke. Its about to catapult into an endgame we never saw coming. This show is the ultimate red herring. It starts off in some magical girl in a high school setting that plucks the weak willed away from the fandom, and the reward is, each season becomes progressively more removed from that premise, and more intense.
Those looking for slice of life magical girl stories can look elsewhere. We're about to go full political drama. The book's launch date was intentionally after the season ended to maximize the amount of eyes on it.
The way they're setting it up, especially during the last episode with Ludo's family, is just the tip of this iceberg.
Ride isn't even half over yet gents.