Tia

Tia (ティア), also known as the Other Goddess or other Premiere, is a game adaptation-original character in Sword Art Online: Hollow Realization. Like her sister Premiere, she is a Non-Player Character (NPC), born from the creation of Sword Art: Origin.

Appearance
Tia looks almost identical to Premiere, the only identifying difference between the twins being the absence of Premiere's small mole right under the corner of Tia's right eye. Like Premiere, Tia has blue eyes and short black hair, the latter of which turned silvery white after she initiated the events of the Great Separation.

Hollow Realization
The Other Goddess was first encountered wandering the streets by Kirito. Mistaken for Premiere, she was led outside the Town of Beginnings, quietly minding Kirito's attempts at conversation while they climbed a hill overlooking a vast expanse of land. Staring into the distance, she listened to Kirito's speech on the endless possibilities provided by their world and his desire to experience all of them with everyone. Upon hearing disturbed laughter at that moment, they investigated the source of the sound, finding a player hallucinating under the effects of a digital drug. When the player was forcibly logged out by his AmuSphere, the Other Goddess stated she had no explanation for the phenomenon they had just witnessed.

After the defeat of the boss of the Jeweled Peak Lakes, the Other Goddess was encountered by Genesis, who was furious at the developers for hiding the real boss behind a decoy, and at Kirito's group for defeating it.

Later, the Other Goddess was spotted by Kirito, Klein, and Agil, who stopped for a quick meal at a popular ramen restaurant. Mistaken for Premiere yet again, she was invited to join them. Accepting the offer, she found the food immensely enjoyable but was slightly confused when Kirito suggested having everyone else along to eat with them for the next time.

After Genesis learned of the alterations performed on the Ground Quest, the Other Goddess, who was named Tia by Genesis, assisted him in finding and obtaining the fifth Sacred Stone. When Genesis unveiled his presence and possession of the item to Kirito and Premiere, who reached the dungeon later, Tia revealed herself to them and observed her twin during Genesis's speach. At the end of the speech, she obediently followed Genesis as he departed from the dungeon.

While Kirito and the others were occupied with a barrier in Kurjiez Desert, Tia was taught how to wield a rapier by Genesis, and thus expressed her gratitude to be of service after dispatching a monster. However, she lost her footing against another monster, thus requiring Genesis to intervene. After the monster was dispatched, they were approached by several orange players, who declared their intentions of settling their grievances with Genesis. At that moment, Tia intervened, offering herself as their opponent and ordering them to either fight her or flee. When the players decide to flee, Tia and Genesis resumed the lesson.