Shin Reglia/Synopsis

Demon Sword Tournament Arc
After defeating the brainwashed Melheis, Anos attempts to revive the sources controlling Gaios and Ydol. However, Shin intrudes into Melheis' Azesith and destroys the sources before Anos can identify them. The Demon King summons Venuzdonoa, but Shin flees, having accomplished his goal — preventing Anos from finding out that Kanon's sources were fused with the Demon Elders, thus keeping the narrative of "Avos Dilhevia" for longer.

Great Spirit Arc
It is revealed that Shin masterminded the events behind the Demon Sword Tournament. Using Elio Ludwell as a puppet, he managed to get Lay Grandsley into submission in exchange for his mother's treatment and use him to fight Anos during the tournament. In addition, Shin attacks Melheis Boran and implants the Demon Sword Shackle onto him.