She is voiced by Mai Fuchigami in the Japanese version of the anime, and by Leah Clark in the English version of the anime.
Agata is a tall slender teenage girl with a similar look to that of Lucia. She has blue eyes and brown hair and she wears the traditional Catholic Nun uniform with white sleeves, collar, and gloves with black robes and a dark grey cross in the front.
Not much is known about her personality but she's devouted to the Roman Orthodox Church. As a member of Agnese Forces, she will blindy follow the orders and wills of her superior Agnese Sanctis and most likely obeys the dogma that the Roman Church has. After joining Necessarius, she most likely reforms like the others and redeemd herself.