Akio Fudou

18 years old, height: 170 cm, measurements: B 82/W 56/H 83. One of the "Trinity Seven." Her specialty is Mantra Enchant. Her "archive" is Gluttony, and her "theme" is Faith. She possesses the grimoire "Fudou Mantra's Time" and Chapter Eight of the "Iliad Fragment," known as Octo. She is commonly referred to as the "Myoou Gongen."

A tall girl who holds the third seat of the Royal Library Inspectors. She hails from near the Sky Library and is a former Spriggan. Her uniform style consists of a shirt with only three buttons fastened and a long skirt with slits. She is a complete combat-type mage with a body assimilation type grimoire, and her basic tactic is hand-to-hand combat in a body-enhanced state using Sanskrit characters. She has a rough and bold personality, and her specialty kicks have the power to destroy floors and walls. By the time of the "Great Magic Research Battle," her Mantra Enchant has improved to the point of acquiring healing abilities. When her magic power is depleted beyond a certain level, she transforms into a petite nun form, but in this state, the reduced Sanskrit characters on her body actually increase her power specialization. After the Divine Comedy Gate arc, she ties her long hair into a ponytail.

She acts together with the aforementioned Mira Yamana. Like Mira, she is conscious of Arata, but unlike Mira, she does not harbor clear hostility and even says they surprisingly get along well. When attacked by Lieselotte, she wishes for her return and trains with Mira to have Arata copy her Mantra Enchant. She develops affection for Arata, calling him "beloved big brother," after he accepted her past without pity at the Sky Library.

Off-duty, she works part-time as a cook at a restaurant related to her "archive," sometimes serving dishes to customers. Her pure destructive power is top-class among the Trinity Seven, and she has also mastered magic known as the Primordial Technique. In the Great Magic Research Battle arc, she teams up with Levi but loses in the first round against Lilith and Mira, wary of revealing their hand to Akasha Academy. That night, during the underground Great Magic Research Battle, she is attacked by Asha, but constructs a magic power body in her nun form and infiltrates the End Library with Levi by hiding in Asha's shadow.

In the Divine Comedy Gate arc, she engages in battles with many formidable foes, including the leader of the Twelve Demon Generals, Meira Coda, showcasing a demon king-class technique of moving her magic power body and real body in parallel during combat. During these battles, she acquires Chapter Eight of the legendary grimoire "Iliad Fragment."

In the new chapter, she is scouted by a messenger from the heavens as a force to defeat the "Goddess of Deep Darkness." However, she is also informed that this would result in losing her qualification as one of the Trinity Seven, causing her and Mira, who is in a similar position, to feel conflicted. After Arata goes to the world of the Black Emperor Flame Realm, she visits the heavens with Biblia, aiming to find clues about him. She is offered the role of Arbiter of Gluttony as the successor to Liber and spends her days training with Amana, who belongs to the Demon King Conciliation Faction, in preparation for the battle with the goddess.