Tia

Tia, 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 the Cardinal System had performed on and activation of the Ground Quest, Sword Art: Origin's Grand Quest which was still under development, the Other Goddess, whom Genesis named Tia, assisted him in finding the location of the fifth Sacred Stone and obtaining it. When Kirito and Premiere arrived at the dungeon and searched unsuccessfully for the stone, after Genesis revealed his presence and possession of the item, the Other Goddess revealed her presence behind her master. As she walked forward and stood face-to-face with her twin, Genesis explained who she was and why he sought to finish the quest, in full knowledge that it would result in the destruction of Ainground and Aincrad. Then the Other Goddess obediently followed Genesis as he departed from the dungeon.

While Kirito and the others were determining how to remove a barrier blocking their progress through the Kurjiez Desert, Tia, whom Genesis decided needed to do her share of the work, learned how to wield a rapier, expressing her gratitude to be of service after dispatching a monster. However, she then lost her footing against another monster, prompting Genesis to intervene and defeat it, to which she thanked him, despite his criticism of her failure. Immediately afterwards, several orange players appeared and announced their intentions of settling their grievances with Genesis. The Other Goddess stepped in-between them and offered herself as their opponent, ordering them to either fight her or flee. Unwilling to receive a blue cursor and the consequences thereof for assaulting an NPC, the players were forced to withdraw, which the Other Goddess reported to Genesis before resuming the lesson.