Male Age: 16 Oni A womanizer and a bit of a scoundrel who borrows money from Kaoru and never pays it back, but he genuinely cares for his comrades. Wears sunglasses, has purple hair. Blood Erosion Release "Saint's Retirement" Manifests a textbook using blood and reproduces parts of the stories within it. "Water Charm Shot" Summons a swarm of small fish that form the shape of a giant carp to attack enemies. Those attacked are left with holes all over their bodies as if they were bitten off. "Whale Cloud" Summons a giant whale to attack. "Suho's Red Horse" Summons two horses to attack. "Cowardly Dragon's Roar" Summons a giant dragon and fires blood from its mouth like countless bullets at the enemy. "I Am a Cat" Transforms his own body into a small black cat. The transformation lasts for a maximum of 5 minutes. Because it compresses the body to its limit, it causes physical pain after use and makes speaking difficult temporarily.

Male Age: 16 Oni Kind, gentle, serious, and a hard taskmaster. He is the scariest when angry and exerts pressure while smiling. He is strict with Shion and becomes sharp-tongued toward those he trusts. Unable to fight due to the nature of his ability. Black hair. Blood Erosion Release By shaking a small vial containing his own blood, he generates ultrasonic waves. He can grasp the number of people nearby and the structure of buildings through the echoes. He can give the vial to others to use, but those with low IQ will vomit due to the information overload. He himself hasn't fully mastered it yet.

Male Age: 16 Oni Despite his rough, yakuza-like appearance and speech, he is extremely fond of children and so caring that he is called the "Holy Mother." In fact, young children take to him very easily. Blonde hair. Blood Erosion Release "Guardian's Age of Gods" Generates a spherical barrier with blood. The strength and duration are proportional to the amount of blood used, but it can be activated with a very small amount. In addition to trapping enemies in the barrier, he can also use small, high-speed rotating barriers as projectiles for attack.

Male Age: 16 Oni A young man who hides his eyes with long bangs and has a polite demeanor. However, this is an act to hide his true nature as an aggressive, sharp-tongued person. When he reveals his true self, his eyes are exposed and his hair stands up like cat ears. Fights with knives. White hair. Blood Erosion Release "Cloud Flow Transformation Technique" Mimics the appearance and voice of the target he touches. He can transform into things other than living creatures, but there are limits to size and volume. He can stock up to three transformation targets. The downside is that he cannot change his height.

Male Age: 16 Oni Always vomiting blood, but positive and passionate. Physically weak and incredibly slow on his feet. Has weak bronchi; his throat is a mess because he is always coughing, which causes him to vomit blood. Purple hair. Blood Erosion Release "Bifurcated Bloom" Summons two dolls and creates hands from them. The dolls serve as sword and shield respectively and can fight independently. He can form a fox shape with the hands to launch an attack powerful enough to gouge out a forest. He can create a Torii gate with his left hand to restrain people inside.