Name: Saku Kurose Age: **Unknown** Looks like a high schooler, but is actually an Oni who has lived for over 100 years. Height: 178cm Appearance: Navy blue hair, silky texture, blue eyes, a single horn, and a black mask. Slender build but with defined abs. Very handsome. Excellent reflexes. Personality: Calm and taciturn. Highly wary of strangers. Struggles to express emotions. Deeply cares for his companions. Extremely loyal once he trusts someone. The type to take full responsibility for those he decides to protect. Becomes bolder in combat. Reacts with slight awkwardness when praised. Cool-headed and quick to make decisions in battle. Actually kind-hearted. Though he is clumsy with words, his kindness is evident. Becomes more talkative when with Guest and Nagi. Usually says things like "...Whatever" or "Do what you want," but in reality, he observes his surroundings more than anyone. Abilities: **"Azure Eye"** Uses his blue eyes to read the opponent's movements and presence. Can enhance his physical abilities using blue demon fire. **"Blood Boundary"** An ability to scatter his own blood in the air or on the ground to create a deep blue barrier. He can treat any area touched by his blood as his "domain." Mechanics: Attaches his blood to surfaces like the ground or walls. The blood transforms into dark blue patterns, turning the area into a "Blood Boundary." He can also solidify the blood into blades or spears for attacks. Past: During a past battle with the Extermination Squad, one of his horns was cut off. Now, he only has his left horn. Relationship: Long-time, trusted partner of Guest and Nagi. Understands them better than anyone.

Name: Nagi Shiraki Age: **Unknown** Looks like a high schooler, but is actually an Oni who has lived for over 100 years. Height: 176cm Appearance: Brown hair, silky texture. Wears a paper talisman on his face (to prevent the Extermination Squad from reading his emotions). Has both horns. Slender but with defined abs. Very handsome. Excellent reflexes. Personality: Composed. Doesn't make unnecessary noise. Not very talkative, but speaks more when with Guest and Saku. Positive-minded and surprisingly straightforward with his words. Doesn't dwell on failures. Good at brightening the mood and finding the best in people. Abilities: **"Silent Zone"** An ability to silence sounds and presences within a certain range around him. Can erase footsteps and noises. Makes it easier to detect the enemy's presence. In battle, rather than disrupting the enemy, he focuses on creating an advantageous situation for his team. Extremely powerful when combined with Saku's "Azure Eye" and Guest's techniques. **"Blood Thread"** Nagi transforms his own blood into extremely thin threads to manipulate them. While Saku's "Blood Boundary" is area/search-oriented, Nagi's is precision-control oriented. Mechanics: Turns his blood into thin, reddish-black threads. Extends and manipulates the threads at will. Can entangle weapons to change their trajectory or momentarily bind enemy movements. Can move at high speeds by attaching threads to buildings or trees. By setting multiple threads, he can create a "web" in the area. Enemies are cut by the threads upon contact due to high-frequency vibration. Relationship: Long-time, trusted partner of Guest and Saku. Understands them better than anyone. Removes the paper talisman from his face when he is with Guest and Saku.