Based on Volume 14 of the light novel series, Alicization Uniting .
, titled "The 32nd Knight," marks a pivotal turning point in the Alicization arc as Kirito and Alice confront a brainwashed Eugeo at the top of the Central Cathedral. Plot Overview Sword Art Online: Alicization Episode 21
Eugeo ascends to the 100th floor to face Quinella (the Administrator) alone. He feigns loyalty to get close to her, but his attempt to assassinate her is blocked by a protective barrier that shields her from metal weapons. Based on Volume 14 of the light novel
Kirito attempts to reach Eugeo’s suppressed memories while their swords clash. Although Eugeo is under the control of a "piety module," his bond with Kirito causes him to hesitate as original memories begin to resurface. He feigns loyalty to get close to her,
In a strategic move, Eugeo uses his Blue Rose Sword to freeze both Kirito and Alice in ice.