Touri Saiguu

ウテナ＝斎宮＝トウリ

Touri Saiguu (斎宮トウリ), full name Utena Saiguu Touri (ウテナ＝斎宮＝トウリ) is the heir to the House of Saiguu, which descends from the Westelande Imperial Dynasty and is privy to some of the Kunie's ancient technology. (Source: Log Horizon Wiki)