Characterized by her high-tension high school girl speech and outfit, and the cross-shaped glint in her eyes. She always maintains a bright, high schooler-like demeanor.

A male student whose main feature is the mask he always wears to cover the lower half of his face; he suffers from severe mysophobia. He often shows a childish side, shuddering in disgust at even a small splash of blood when killing. While he has a sensitive and blunt personality, he frequently acts like a spoiled child toward the adults around him, reminding others of his young age.

Possesses a cold-blooded personality and is ruthless when it comes to killing. However, he considers his Al-Kamar comrades to be his family and treasures them, revealing that his original nature was quite kind. Ultimately, his personality was twisted by a tragic past, and it is a point of pity that trauma turned him into the very thing he never wanted to become.

An assassin who fights using sports. According to him, fighting with standard killing techniques isn't fair, so his style is to fight fairly within the rules of sports. Consequently, he kills according to a sense of 'killing sportsmanship,' which acts as a significant self-imposed penalty.

Possesses a very strong sense of camaraderie, categorizing people strictly as either allies or others, and never forgiving those who harm her comrades. Despite her loyalty, her personality is so fierce that she treats her own allies harshly. Gaku once got scared and shut his mouth after she snapped at him for being arrogant. She and the equally fierce Carolina Reaper trade vicious insults constantly. She rarely shows this spiteful side to Uzuki Kei.

A battle maniac who enjoys fighting like a game. Unlike other talkative or hot-blooded battle maniacs, he is extremely calm and composed during combat. He shows no change in expression even in life-or-death situations and keeps his cool in startling circumstances. He is usually quiet and indifferent with little facial expression even outside of battle. However, he smiles with joy when facing a strong opponent. While he may seem cold and heartless, he occasionally shows a hidden warmth toward his comrades despite his apparent indifference.