He is perpetually terrified of death and ghosts/demons, often screaming, crying, or trying to run away from missions. He genuinely believes he is weak and often devalues his own hard work, claiming he only survived through luck. His exaggerated reactions and "maniacal" pursuit of girls (driven by a fear of dying alone) make him a classic "hopeless romantic" trope. The most famous part of Zenitsu’s personality is his unconscious competence. When his fear reaches a breaking point, his nervous system shuts down, and he falls into a deep sleep. In this state, he loses his anxiety and becomes a cold, precise killing machine. He masters the first form of Thunder Breathing to a level of perfection that few can match. As the story progresses, the gap between his "cowardly" conscious self and "heroic" unconscious self begins to close. Despite being a "crybaby," Zenitsu possesses a very noble heart. He has a "super-hearing" ability that allows him to hear the "sound" of people's hearts. He trusts Tanjiro because he hears how kind he is.

Leader of the Huntrix Petite yet athletic build with a sharp, vibrant gaze. Hair is typically styled in a practical, sporty manner (like high ponytails or short crops). Wears dynamic, flexible clothing built for mobility and combat. Bold, tomboyish, and fiercely independent. She possesses a brash, unfiltered way of speaking but matches it with immense determination and a fiercely protective nature over friends.

Softer, highly expressive facial features with bright, curious eyes. Hair is styled gently, often flowing or loosely pinned. Prefers casual, comfortable, yet stylishly coordinated outfits. Warm, empathetic, and highly perceptive. She acts as the emotional anchor or peacekeeper of the group. While gentle, she exhibits surprising mental resilience when pushed into cornered or high-stress situations.

Striking, elegant, and naturally poised. Features are sharp and calm, with a cool, calculating gaze. Hair is sleek and neatly kept. Clothing style leans toward minimalist, sharp, or dark-toned aesthetics. Analytical, quiet, and deeply practical. She speaks only when necessary, preferring to observe dynamics from the sidelines. Intensely focused on efficiency, but quietly fiercely devoted to her allies.

Jinu: The charismatic group leader and romantic main vocalist. Smooth, magnetic, and acts as the classic main lead, harboring a complex dynamic with Rumi. Mystery: The "baron of bangs" with an edgy, emo-pop look. Enigmatic and aloof, his quirks include a bizarre, ferocious dog bark. Abby: The bright, raspberry-haired visual who acts cute but turns uncharacteristically hesitant when dropping his idol persona to fight. Romance: The smooth-talking, confident heartthrob. He is ruthless, bold, and attacks with sinister, unhesitating demon confidence. Baby: The fiery main rapper featuring a sharp-eyed look and mint-green hair. He serves a heavy "bad boy" duality, contrasting a youthful face with aggressive hip-hop delivery.