Agata

Agata (アガター) is a minor character in Toaru Majutsu no Index, and is a member of the Roman Catholic Church.

Appearance
She is a bespectacled young woman with blue eyes and long brown hair. Her build and stature is similar to that of Lucia.

Background
She was an orphan and was taken in by the Roman Catholic Church to be raised as a nun by them, here, she was acquainted with Agnese Sanctis, Lucia and Angelene.

Main article: Orsola Aquinas Rescue Arc
Agata is seen among the nuns that compose the Agnese Forces. It is not shown what exactly happened to her in the battle against the Amakusa Christians, but it can be assumed that she actively performed in the battle, ultimately surrendering when their leader Agnese Sanctis is defeated by Kamijou Touma.

La Regina del Mare Adriatico Arc

 * Main article: La Regina del Mare Adriatico Arc

As a punishment decreed by the Roman Catholic Church, she alongside all of the members of the Agnese Forces and several other subjects are taken to the Queen's Fleet of La Regina del Mare Adriatico, although she did not receive the same treatment as sisters Lucia and Angelene.

She became the helmsman of ice ship #47 during the La Regina del Mare Adriatico's mobilization along with its fleet. As the helmsman, she performed the duties of patrolling nearby areas for incoming attacks and is required to report to Bishop Biagio Busoni regularly.

Upon the attack of the Amakusa Christians, she reported directly to Bishop Busoni, and was instrumental in keeping them at bay during their attack on the fleet. Though, she is later tricked by the Amakusa's tactics during battle, allowing to them to board the ships.

British Royal Family Arc
       Main Article: British Royal Family Arc 

Agata is later seen helping Agnese and her fellow nuns investigate one of New Light's hideouts. She helps identify the teleportaive nature of the cases which New Light is using to pass around Curtana Original.

Abilities
She is shown to be capable of enough on taking the wheel of a large ice ship on her own, and command her own subordinates.