Blue exorcist / Kat?, Kazue

"After dealing with the demons of Shura's past, Shura, Rin and Yukio return to True Cross Academy. While Yukio recovers from his wounds, Rin and his friends get back to their lives. But trouble is brewing as The Illuminati continue to advance their plans. Lightning launches an investigation of The Illuminati, intending to get to the bottom of things. With Suguro in tow, he heads for True Cross Academy's restricted archives, looking for leads that will help him solve the mystery of the events surrounding the "Blue Night." Back on campus, an old adversary makes an unwelcome return..."--Back cover.

"Shura Kirigakure has always been one of Rin and Yukio's closest and most trusted friends and mentors, but her past is a mystery. When Shura suddenly goes missing, Mephisto sends the Okumura brothers to the cold and wintry backcountry of Aomori Prefecture to find her. The journey is a chance for Rin and Yukio to talk over recent events, and try to sort out where things stand between them. Out in the frozen hills, Shura reaches her destination, and a meeting with an entity who will impose an ancient curse upon her..."--Back cover.

Exorcist Rin Okumura continues to try to control his demonic powers as distrust swirls around the heads of the various Myodha temple families, and he receives a letter that reveals information about his past.

Just when they thought their task was over with the defeat of the Impure King, the Exwires learn about a strange event that has occurred in the desert, and the supernatural occurrences at the Academy embroils Rin and his friends in further turmoil.

"Trapped by Professor Gedoin in the hellish prison beneath Dream Town Inari, the Exwires must fight to survive and rescue Izumo. The more they learn about Professor Gedoin's plans, the more they realize the horror they face. Each will need to rely on their own strength, and each other, like never before. But Izumo is determined to meet her fate on her own and save her sister, even if it means her destruction! What will Rin and his friends lose in order to win?"--Back cover.

The Impure King, now awakened by Todo, threatens the city of Kyoto. Rin and Ryuji join exorcists and monks in their attempts to stop the demon, while Yukio faces off against Todo alone.

The Exwires learn the truth about what happened to Izumo's mother at the hands of Professor Gedoin. Now Izumo has also been captured for the professor's experiments. Izumo's friends attempt a rescue mission and encounter a horror they didn't expect.

Rin and the rest of the Exwires race to find Izumo as she confronts Nemu Takara. The betrayal they discover and the tragic details of Izumo's past will herald the beginning of an all-out war between the Illuminati and the Knights of the True Cross.

"Rin and his friends continue to investigate the Seven School Mysteries. Yukio watches as the Exwires take on the Academy's ghosts, troubled by lingering doubts about his own feelings. Rin seems to be learning to control his power more, but is tapping his inner demonic fire going to be his salvation or his doom?" --.