Quinella

"I'm both the ruler and the overseer. From this day forward, I'm the Highest Minister of Axiom Church... I'm Administrator!"

- Quinella renaming herself as Administrator

Quinella, also self-proclaimed as the Administrator, is an antagonist from Sword Art Online series, serving as the main antagonist of the first half of Alicization Arc. She is the self-proclaimed Administrator of Underworld and high minister of Axiom Church. She is responsible for corrupting the government from behind the scenes, disposing those who oppose her.

She is voiced by Maaya Sakamoto.

Personality
Quinella is an above all sadistic, callous and narcissistic tyrant who is not above killing, torturing, and brainwashing anyone to keep Underworld for herself.

Fear of losing her own power and lifespan, Quinella takes control over the entire Human Empire of Underworld as its ruler to keep herself in charge. She spends most of her time asleep in order to preserve precious memory space, but the laws she placed over the land and its people might as well be God-given edicts to follow consciously or subconsciously given her Cardinal Authority and are enforced by her Integrity Knights. In the backstory, while she fused with the Cardinal System to regulate UW, her original intention was to outright steal its powers and authority for herself.

While she claims that turning the people of Underworld (including her Knights) into sword golems is for their own safety, it's clear by her actions that she's nothing but a narcissistic control freak who's no better than any of the other psychos Kirito has faced, like Nobuyuki Sugou or Laughing Coffin. Being a narcissistic sociopath and a selfish woman, Quinella only wants to control everything in her reach, killing and torturing anyone who dares to challenge her or "her" empire, which is full of so much of decadance that both Kirito and Cardinal believed that the Underworld would be better if it was destroyed instead of being oppressed under Quinella's iron fist.

Trivia

 * Quinella serves as an evil counterpart to Alice. Like Quinella, Alice was very talented in the Sacred Arts. One of Alice's most well-known abilities was to predict a storm one week in advance at a rather young age, while Quinella was also able to predict the weather just three days in advance.
 * A notable difference between Alice and Quinella is their parentage. Quinella was born in a noble family in the capital. In contrast, Alice was born in a family of villagers in one of the most remote villages in the Human Empire. However, it's implied that, had Eugeo and Kirito never meet her, Alice might have walked down a similar path to Quinella.