: The arc forces the audience to question what makes a soul "real." Characters like Alice S30 represent the first "A.L.I.C.E." (Artificial Labile Intelligent Cybernated Existence) to exhibit true free will.
: The series took on more mature themes during the War of Underworld arc, featuring intense violence and psychological horror related to the antagonist Gabriel Miller. Production and Legacy Sword Art Online: Alicization
: This rigid law governs the residents, making it impossible for most to commit crimes, a central plot point when Kirito and Eugeo are imprisoned for breaking it. : The arc forces the audience to question