Sword Art Online 2x21
The Monument of Swordsmen
While Kirito and Klein take on the raid party reinforcements by themselves, Asuna and the Sleeping Knights fight their way through the raid party blocking the boss room. Inside the boss room, Asuna and the Sleeping Knights battle the Four-Armed Giant again, in which Asuna figures out that the jewel on the Four-Armed Giant's chest is its weakness. Yuuki uses Tecchi's back as a stepping stone to jump and uses her sword skill to destroy the jewel, thereby destroying the Four-Armed Giant. With the mission concluded, the Sleeping Knights agree to have a celebration at Asuna's log house. During the celebration, Asuna asks Yuuki if she could join the Sleeping Knights, but Yuuki declines since the group will be disbanded in the spring. They go to the Monument of Swordsmen on the 1st Floor to take a picture with their names carved on the large stone tablet behind them. After accidentally addressing Asuna as her older sister, Yuuki unexpectedly starts crying and abruptly logs out.