Fyodor of Mandragora

•Strangle Shrill: This is Fyodor's main attack. It's a technique where he uses the face carved into the Mandrake Surplice. When unleashing this technique, the face comes to life and adopts an aggressive expression, opening its mouth to release a powerful sound wave, accompanied by a very high-pitched shriek, similar to what mandrakes were said to emit. The acoustic wave destroys everything in its path, until it violently impacts the body of its adversary. The impact of the acoustic wave on its victim causes a slight paralysis effect that reduces their combat capabilities. The sound wave released in this attack can cause death by destroying the inner ear and brain of its adversary. •Scream Drowned: Fyodor creates several energy mandrakes that unleash a sonic scream capable of destroying entire mountains and shatters the opponent's eardrums, instantly killing them.

They are then attacked without warning by Marchino, and are forced to land in the torture chamber, to the surprise of Tenma, who asks if Yato was also murdered, but Yato tells him to shut up, and Yuzuriha concludes the brief fight against Marchino by grabbing him with her scarf and then hitting him with a kick to the head. Tenma and Yato are surprised to see so much strength in this girl. Fyodor's voice echoes, and he is pleased to kill all the intruders. Fyodor appears behind Yuzuriha and the face of his Surplice opens its mouth to unleash its Strangle Shrill. Yato steps in to protect Yuzuriha, then gets up in form, ready to fight. Tenma warns Yato, a little late, that Fyodor's attack produces a paralyzing effect. The Specter confirms that the shockwave projected by the face on his chest is not normal, and offers them an explanation about the myth of the mandrake. Legend says that the mandrake produces a heart-wrenching scream, deadly to any living being in the world. Yuzuriha launches into the attack, but is repelled by the shockwave of the mask on the Surplice. Yato tries to hit him, but Fyodor stops his attack and grabs him by the neck, intrigued by the fact that so many living beings are infiltrating this place, and warns him that he will kill him. Yato smiles and hits the mask of his Surplice at close range with a violent kick, Unicorn Gallop. The mask cracks, causing Fyodor's anger, who throws Yato to the ground with a punch. Yuzuriha recovers and tries to prevent the Specter from killing Yato, but both are hit by a powerful shockwave. Tenma breaks his chains, driven by the desire to save his friends, and uses his Pegasus Suisei Ken. The attack impacts directly on Fyodor's body, ending his life; before dying he says that it was impossible for him to concentrate all his blows on a single point.

Tenma's soul falls into the Hill of Yomotsu after being wounded by Alone when they meet in his old village. The Saint is fighting Marchino, while Fyodor travels to where the two are, to see what is causing so much commotion. Once he arrives, Fyodor is astonished to see a dead man with so much energy, and expresses his contempt upon observing that he is a Saint of Athena. Tenma attempts to attack one of those he considers responsible for Alone's change, but is quickly defeated by his opponent when he uses his Strangle Shrill. Fyodor and Marchino take the unconscious Saint to a ruined building located in Yomotsu and chain him inside. Tenma regains consciousness and sees Fyodor approaching him. The Specter knows that he has before him the Saint of Pegasus, a former friend of Hades' host. He thinks that Tenma is still able to move freely due to Hades' kindness. These words annoy the Saint, who doesn't want to hear a Specter talk about kindness, and he tries to free himself to attack him, but Fyodor attacks with the powerful shriek emitted by the face on his Surplice. Fyodor assures him that he will not remain alone for long, because one of the three Meikai Sankyotō, Minos, is heading towards the Sanctuary. Fyodor leaves, leaving Tenma screaming in rage, while Yuzuriha and Yato come to save Tenma and hide in the building, thinking it's the right time to go and help their comrade.

Fyodor is a warrior known for his cruelty. His cruelty prevents him from ending his victims' lives without inflicting pain, until he hears them scream in agony from the wounds he inflicts. Therefore, he usually seeks to leave his enemies unconscious before torturing them, being a bloodthirsty inhabitant of the Underworld. He not only enjoys physically torturing his enemies, but also psychologically. Even so, when the situation demands it, this Specter is more than just a tormentor; he becomes an executioner, seeking to annihilate his enemies in a single second. He displays complete confidence in his abilities, demonstrating an attitude of confidence and superiority towards his adversaries, whom he considers rats. But he can lose this facet of confidence and calm when he receives an injury or damage from his adversary; this causes him to abandon his sadistic attitude and decide to become an executioner for whoever harmed his body.

Fyodor is a young adult with a physique suggesting an age between 20 and 30 years old. He is 185 cm tall, taller than average, and has an athletic build due to his warrior training. His face has rather fine features, making him appear attractive, but his most distinctive characteristic is his blind eye, covered by a black patch. He has long, black hair that falls slightly below his shoulders, styled so that his bangs cover his blind eye.