Ao no Exorcist: Shimane Illuminati-hen - Episode 12 (Finale)

In the finale of "Ao no Exorcist: Shimane Illuminati-hen," the aftermath of recent conflicts leaves the characters grappling with trust and betrayal. Despite their past battles and the revelation that Shima is a spy, uncertainty about his loyalty lingers within the group. Shima openly admits his neutrality, enjoying his role as a double agent while attempting to shield his former comrades from harm. Bon, despite their earlier friendship, expresses his lack of trust in Shima and wishes him well for the future.

Yukio faces his own dilemma of divided loyalties after being approached by Lucifer to join the Illuminati, who promise him power to unlock his hidden potential. This offer haunts Yukio and complicates his feelings of allegiance toward the True Cross and Mephisto.

A relaxation trip to a hot spring and water park, arranged by Mephisto for the group, takes a chaotic turn when the Three Wise Monkeys are unleashed and wreak havoc. This leads to an incident involving Rin, Shima, and a water slide, inadvertently exposing Rin's feelings for Shiemi. The prank causes tension and nearly results in injuries but ultimately resolves amicably, allowing the group to reflect on their relationships and the challenges they must face.

The episode ends with Yukio contemplating his strength and the temptation to join the Illuminati, hinting at potential plot developments for future arcs.