Sword Art Online: Alicization Episode 12 -

: Quinella eventually merged her consciousness with the system to stop her aging, effectively becoming the Administrator . She created the Taboo Index to prevent others from gaining power like she did. Production Information Original Airdate : December 22, 2018. English Dub Airdate : April 20, 2019. Voice Cast : Kirito : Yoshitsugu Matsuoka (JP), Bryce Papenbrook (EN). Eugeo : Nobunaga Shimazaki (JP), Brandon Jay (EN). Cardinal : Sakura Tange (JP), Lizzie Freeman (EN).

: Before the battle concludes, a mysterious girl named Cardinal opens a warp gate, pulling Kirito and Eugeo into the Great Library Room within the Central Cathedral. Sword Art Online: Alicization Episode 12

Watch a detailed breakdown of the Library arc and Quinella's backstory: : Quinella eventually merged her consciousness with the

: Cardinal reveals the history of the Underworld. She explains how Quinella , the first person to discover system commands (Sacred Arts), eventually "leveled up" her authority by hunting animals to the point where she could manipulate the world's very laws. English Dub Airdate : April 20, 2019

In , titled " The Sage of the Library ," the story shifts from intense combat to a major narrative revelation. After escaping their prison cell, Kirito and Eugeo are confronted by the Integrity Knight Eldrie Synthesis Thirty-one. Key Plot Developments