Upon being pressed about the murders, Maria tells them that Beatrice is the culprit, though Battler refuses to accept this explanation. As they argue, Natsuhi bars everyone inside the room and demands Beatrice show herself. By the time everyone breaks out of the room, they see Natsuhi as she drops dead, apparently having commited suicide. Golden butterflies soon fill the room, and the remaining survivors are killed. Afterward, everyone is brought to Purgatory, revived and joking about how they should have solved the epitaph rather than determine who was committing the murders. However, everyone except Battler is convinced that the culprit is a witch. When Battler insists that everything that happened could have been carried out by human means, he is confronted by Beatrice herself, who challenges Battler to prove that the murders were not caused by magic. Beatrice discusses the events she has set into motion with a rival, Bernkastel, who plans to lend her own powers to assist Battler.

Ange enters the Golden Land where she happily reunites Maria with Sakutaro and forces Beatrice to continue the game. Battler, however, has lost his soul due to his uncertainty of his own identity. Desperate to revive Battler, Ange confirms his qualifications as Kinzo's grandson, and reveals her own identity as his sister to him, successfully restoring him. Having broken the most important rule as a piece in the game to keep her identity a secret, however, Ange dies. With Battler's resolve strengthened and Beatrice realizing she cannot escape the game, the two engage each other in their final confrontation, with Battler's blue truth against Beatrice's red truth. Kinzo's spirit appears to protect Beatrice, but Battler dispels him in blue by confirming his death not only at the start of the fourth game, but every game thus far; however, Beatrice confirms in red that there are actually no more than seventeen people on Rokkenjima. Nevertheless, Battler manages to explain all four games through human means, while Beatrice is left completely skewered by his blue truth, but unable to die. Beatrice begs Battler to kill her and presents him the last mystery she is able to give: since Battler is the only person left alive on the island, and yet Beatrice is also there to kill him, Beatrice asks, "Who am I?" Understanding Beatrice's plight, Battler promises to solve her final mystery and put an end to her suffering. Bernkanstel and Lambdadelta, however, intend to keep Beatrice in the game, torturing her for eternity.