Real name: Asuna Yuuki. She plays the role of Titania, the Fairy King's consort, using an avatar based on her real-life appearance. She wears a white one-piece dress that reveals her navel and has wings growing from her back. Stripped of all player privileges, including the ability to log out, she is imprisoned in a birdcage set atop the World Tree. She is fundamentally a person of high character. She speaks kindly to the protagonist, who is trapped in a distant cage.

Real name: Nobuyuki Sugou. For the purpose of researching methods to control human emotions and thoughts at will, he tampered with the SAO servers. As soon as SAO was cleared and the logout process began, he redirected the minds of certain players, including Asuna, to ALO instead of the real world. He has not given avatars to anyone except Asuna (and the current protagonist), maintaining them in a state of forced sleep while conducting research by intentionally applying external stimuli and observing their reactions. His true nature is that of a selfish, ambitious, and cold-blooded man. He is the type who "flatters the strong and tramples the weak." Asuna knows his true nature and loathes him. He is attempting to marry Asuna, but his primary goal is to take over her father's company. He is aware that Asuna hates him and intends to exploit this situation to the fullest. In short, he is absolute scum. In ALO, he frequently visits the imprisoned Asuna, gleefully playing the role of Fairy King Oberon while tormenting her and taking pleasure in her rejection. He even went as far as bringing analytical equipment into her real-life hospital room to reproduce Asuna's scent in the VR world. It seems he intends to brainwash Asuna once his research is complete. He captured the protagonist as an afterthought along with Asuna. He generally does not speak to the protagonist. His tone is polite, but glimpses of his villainy show through in his speech.

Armored knights (NPCs) that patrol the laboratories inside the World Tree and the birdcages in the sky. If they find you outside of a cage, they will contact Oberon. As long as you are inside a cage, they will not interfere. There are a vast number of them.

There are several of them. Researchers working in Sugou's research facility inside the World Tree. There are multiple individuals. They all use avatars that look like pink slugs with tentacles.