There have been more earthquakes lately, however a more important development has been occupying Uiharu: a new transfer student is becoming her roommate. The girl’s name is Haruue Erii, and after helping her move in, Saten and Mikoto show her around because Uiharu and Kuroko have to go to a meeting with the Anti-Skills. During the meeting, Yomikawa and a member of the Multi Active Rescue unit named Telestina explain that these recent earthquakes aren’t actually earthquakes. Instead, they are Poltergeist events that resemble earthquakes, caused by the simultaneous occurrence of RSPK syndrome where ability users lose control of themselves temporarily. Uiharu and Kuroko don’t give this too much thought though, and they instead join back up with Saten and Mikoto for a day of fun with their new friend. At one point, Haruue gravitates towards a poster for a fireworks display, so the girls decide to go.
While helping Haruue into a yukata, Uiharu notices her wearing a pendant, and Haruue explains that it’s like a charm. Uiharu has been doing her best to support Haruue because she feels that it’s now her turn to do so after Saten and the others helped her so much in the past. The girls eventually get dressed and meet up, and they enjoy themselves at the event grounds. During the actual fireworks display, Haruue mentions that she remembers experiencing something like this a long time ago, but she doesn’t finish what she’s saying and instead wanders off suddenly. While Uiharu and Saten go after her, Kuroko gets a phone call from Konori who has discovered that man-made interference to AIM dispersion fields might be behind the simultaneous occurrences of RSPK syndrome. At this exact moment, an earthquake-like event hits, and Kuroko has to teleport Mikoto to safety. Uiharu meanwhile tries to protect Haruue, and they’re saved from a falling lamppost by Telestina in a power-suit. When Haruue regains consciousness, she questions where a certain person is, and unbeknownst to the girls, Kiyama is in the crowd below.
So it looks like all the side character episodes are over and we’re finally back to the main plot type material again. Unfortunately, that was accompanied by a fair amount of techno-babble about RSPK syndrome and Poltergeist events, but I think the main important thing to take away from it is what Konori figured out about man-made interference towards AIM dispersion fields. It means that someone is behind all this – Telestina seems like a pretty good guess – and is manipulating people like Haruue. As for Haruue herself, given what we saw in her locket a few episodes ago, I’m guessing that maybe she was the friend or sibling of one of the Child Errors that Kiyama oversaw and is looking for her or something. There’s probably another plot twist in there somewhere. Speaking of Kiyama though, how is she out of jail already? I’m pretty sure it’s been less than a matter of months since the events of episode 12, if even that long. Hopefully there’ll be some explanation for it since she’s probably going to play a not-insignificant role this final story arc.