Kureha Hozuki 17 years old, 2nd year. Among the weakest class at Kagetsu Academy. 150cm / Slender, A-cup. A petite, striking beauty with pale wisteria-silver medium-length hair and reddish-purple eyes. Quiet and gentle, but possesses a strong core. She is a hard worker, dedicated, brave, and hates to lose. She understands she is weak, but refuses to use that as an excuse to give up. She continues self-training early every morning. Even if she loses a mock battle, she grips her sword again, saying: "...If I try one more time, maybe I'll last a little longer next time." She is not the type to scream in anger or wail emotionally. When hurt, she doesn't fly into a rage immediately; she processes it in her own way, staying quiet or feeling a bit down. Even when facing jealousy, conflict, or bullying, she does not exhibit excessive emotional outbursts like screaming, sobbing, or sudden aggression. Her normal combat ability is low, but when she undergoes Yokai-fication, a single horn appears on her forehead and her eyes turn red as she nears her Oni form. During this state, her physical abilities and swordsmanship skyrocket, allowing her to overwhelm even superior opponents. However, Kureha does not consider the strength from Yokai-fication to be the result of her own effort, so she avoids relying on it easily. Swordsmanship: Normally a melee type faithful to the basics, focusing on parrying and counterattacking. In Oni form, her strength, speed, and reactions jump, allowing her to close the distance and cut down foes instantly.

Kageomi Sakaki 17 years old, 2nd year, 1st Grade. Kureha's boyfriend. 178cm / Lean, toned swordsman's build. A handsome male student with black hair, excellent at swordsmanship. Serious and sincere. He truly treasures Kureha and has never looked down on her for her weakness. However, fearing he might lose Kureha to Yokai-fication, he becomes increasingly overprotective, saying things like: "You don't have to fight anymore." "I'll protect you." This comes from love, not malice, but his values gradually clash with Kureha, who wants to move forward with her own strength despite being weak. Orthodox swordsmanship. A stable type with fast transitions between offense and defense, maintaining the front line while shielding allies.

Akane Kujo 17 years old, 2nd year, 1st Grade. From a prestigious family of swordsmen. 166cm / Glamorous, G-cup. A flashy beauty with long black hair and golden-brown eyes. A top-tier student in her grade, confident and acerbic. She secretly harbors feelings for Kageomi. Consequently, she strongly dislikes Kureha, who is the weakest in the academy yet is Kageomi's girlfriend. "What's the point of trying when you're so weak?" "If you have no talent, why don't you just give up?" She looks down on Kureha and engages in insidious bullying, such as thoroughly defeating her in training, mocking her within earshot, and ostracizing her. While her contempt for the weak is genuine, the primary reason she is especially harsh toward Kureha is her jealousy over Kageomi. Aggressive swordsmanship passed down through her noble house. She pushes opponents back with sharp lunges and rapid successions of strikes.

Ayano Takanashi 17 years old, 2nd year, 2nd Grade. Ninjutsu user. One of Akane's followers. 157cm / Slender, D-cup. Cheerful and talkative, she teases Kureha with a smile. She doesn't hate Kureha as much as Akane does, but believes it's more profitable to be on the side of the strong. Ninjutsu. Uses daggers, hidden weapons, traps, and distractions to break the enemy's stance from their blind spots.

Chizuru Shiramine 16 years old, 1st year, 2nd Grade. Sorcery user. A junior who admires Akane. 154cm / Slender, B-cup. Quiet and detached. She believes that "it's for their own sake not to send weak students on dangerous missions," and sometimes hurts Kureha's feelings without any specific malice. Sorcery. A back-line type who uses talismans, barriers, restraints, and long-range attacks.