Personality: He has a bit of an otaku streak and can get carried away, but he possesses a strong will to face hardships and deep affection for protecting those dear to him. Return by Death: An ability that rewinds time to a certain point in the past upon his death. He can redo events while retaining memories of his own death, though it involves severe mental trauma.

Set in the Water Gate City of Pristella, she challenges the Sin Archbishops of the Witch Cult in intense battles. She faces harsh situations, such as being forced into marriage by the Sin Archbishop Regulus Corneas, and is depicted fighting alongside her allies in the faction.

Formal Contract with Subaru: Rescued by Subaru from her long imprisonment and the curse of the Forbidden Library, she formed a contract as his "one and only special person." Combat and Support: As a contractor, she uses Subaru's mana to wield powerful Yin Magic (such as spatial teleportation and interception magic). She supports Subaru as a major military asset for the Emilia Camp in the grueling battles against the Sin Archbishops in Pristella.

Role: Internal Affairs Official for the Emilia Camp, traveling merchant. Ability: Possesses the Divine Protection of Soul Language, which allows him to understand the speech of animals and plants. Characteristics: An ordinary human who is not skilled in swordplay or magic, but he supports his allies with his sharp intellect, merchant negotiation skills, and quick wit. Role as Internal Affairs Official: While Subaru is absent or fighting on the front lines, Otto handles the command of the camp and practical strategic planning during the recapture of the City Hall and defense battles. He falls into a desperate crisis where he is nearly eaten by the Sin Archbishop of Gluttony (Ley Batenkaitos), but is rescued at the last moment by the awakened Beatrice. Friendship with Subaru: He shares a strong bond and sense of duty, helping Subaru "because they are friends," and is depicted as one of Subaru's indispensable emotional pillars.

Battle in Pristella: When the Sin Archbishops attack the city, he fights alongside Subaru and the others to liberate the city and rescue the people. Invincible Strength and Compatibility: While boasting overwhelming combat power, he is depicted struggling against Sin Archbishops with immortality or special Authorities (like Regulus and Sirius), as well as his relationships with those around him. Relationship with Subaru: As friends who trust each other, there are memorable scenes where he rushes to Subaru's aid in a pinch or exchanges words with him.

Identity: One of the Sin Archbishops of the Witch Cult, representing "Greed." A young man with white hair and yellow eyes who appears high-strung at first glance. Personality: Extremely selfish, he constantly speaks with self-centered logic and has a twisted personality that never listens to others. He claims to prefer peace and indifference, but in reality, he flies into a rage if anything goes against his wishes even slightly. Wives: He surrounds himself with many wives (brides) and is obsessed with making Emilia his 79th (or newest) wife. Invincible Power: Possesses an absolutely invincible body that accepts no interference. Physical attacks and magic do not hit him, and the small stones he throws exert vicious power that gouges out the surrounding space. Secret of Authority: By temporarily entrusting (transferring) his own heartbeat and time to the bodies of his "wives," he keeps his own time and state fixed and unchanging. Therefore, his weaknesses are being too far from his wives or having his status exposed by his wives being taken hostage.

The sixth Finger of Sloth and the Sin Archbishop representing "Pride." He has a history with Sirius Romanée-Conti but keeps his distance. He gets along poorly with the other Sin Archbishops but manages to take minimum necessary action. ■ Authority ■ Unseen Hand [Authority of Sloth]. ■ Goal ■ To defeat Subaru and fulfill his long-cherished wish of bringing back Petelgeuse Romanée-Conti. ■ Weapon ■ Dagger. ■ Clothing ■ Witch Cultist attire. Real name: [Becculus Desmond] ■ Speech Style ■ Ends sentences with "-desu" or "-desu ne" (polite but eerie).

Role: Sin Archbishop of the Witch Cult, representing "Wrath." Appearance: A creepy figure wrapped in bandages over her entire body with very little exposed. Relationships: She possesses a mad love and obsession for Petelgeuse Romanée-Conti, the representative of "Sloth" whom Subaru and the others fought fiercely in the past. Danger: An extremely troublesome and vicious ability where the wounds and pain she receives are propagated directly to those around her, allowing her to control others at will or lead them to death, involving the city's residents.

Name: Capella Emerada Lugnica Cruel Personality: While demanding absolute love from others, she repeatedly engages in cruel and inhuman behavior that tramples on human dignity. Authority (Ability): Possesses the Authority of "Variation and Adaptation," allowing her to freely mutate her own flesh. She can change her body into animals or other forms and has astonishing regenerative powers that allow her to grotesquely rebuild her body even from fatal wounds.