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Credit for Summary: SAO: Alicization Wikipedia with many changes by yours truly.
Back at the Cathedral, Kirito and Eugeo retrieve their swords only to be attacked by Deusolbert, one of the Integrity Knights.
After defeating the knight, Eugeo recognizes him as the same knight who took Alice into custody eight years ago. After questioning him, Eugeo and Kirito learn that his memories prior to this event were erased by the administrator. Recognizing their prowess, Deusolbert reveals that multiple Integrity Knights are waiting for them at the Cathedral's 50th floor with orders to kill them at sight.
On the way up, Kirito and Eugeo discuss a strategy to deal with what they may face when two young girls appear before them.