A Certain Scientific Railgun - Episode 020 - Poltergeist
Kazari gets a new roommate, a transfer student named Erii Haruue. As Mikoto and Ruiko hang out with Erii, Kazari, Kuroko and Mii attend a joint AntiSkill/Judgment meeting held by Therestina of the Multi Active Rescue(MAR) Squad concerning earthquake-like "Poltergeist incidents" caused by multiple espers suffering from RSPK syndrome as a result of temporarily losing control of their abilities simultaneously. While Judgment are ordered to only debunk the rumors, Mii decides to do some investigating. Meanwhile the girls decide to celebrate Erii's arrival by attending the local Hanabi festival. As Erii starts to reminisce about her past with her new friends, she suddenly goes into a trance and wanders off on the hill their on. Kuroko soon gets a call from Mii who reveals these Poltergeists are not natural but were created on purpose. At that moment, another Poltergeist event occurs over where the girls are. Kazari tries to protect Erii from a falling lamppost but both are saved by Therestina in a powered armor. As the girls come to grip on what has happen, below the hill, a familiar woman is seen in the crowd.