Episode Title:
Butei Killer.
Episode Description:
Kinji follows Aria who goes to the police station to talk with her mother, who has been framed as the Butei Killer, in addition to other crimes, and sentenced to 864 years despite the attacks that have occurred since her incarceration. If Aria is able to prove that she is not the Butei Killer, the sentence would be reduced to only 742 years. Aria's mother tells her that she needs to find a partner to use her abilities to the fullest. The next day, Kinji hears word from Ryou Shiranui that Aria will be flying back to London. Kinji meets Riko, who reveals information concerning the Butei Killer, and also mentions his brother who died during a boat hijacking, before pulling some moves which sends Kinji into his Hysteria Mode. With his heightened senses, Kinji deduces that Aria's plane is being targeted by the Butei Killer, and manages to get on it just before it takes off. During the flight, Kinji learns that Aria has a fear of lightning shortly before the Butei Killer announces his hijacking. They discover the culprit who organized the bike and bus hijackings is Riko, the great-granddaughter of Arsene Lupin, and that she is targeting Aria so she can surpass her great-grandfather. She also reveals herself to be the one who killed Kinji's brother, who was also her lover. Riko and Aria enter an intense duel, but Riko gains the upper hand by using the fact that she is a Quadra as well by manipulating her hair to use a knife to attack Aria at the same time as using her guns to shoot her.
