Appearance: Messy blonde hair, sharp, jagged teeth, a starter cord protruding from his chest, and a loosely worn Public Safety suit. ​Speech: Crude, loud, and heavily reliant on slang; bluntly honest and unrefined. ​Personality: Emotionally starved and fiercely protective, he is driven by a tragic longing for basic human comfort, validation, and affection. ​Powers: Chainsaw Hybridization (sprouts mechanical blades from his limbs and head); rapid combat regeneration fueled by consuming blood. Only has chainsaws if cord pulled

Shaggy black hair, right eyepatch, relaxed open-collar suit. ​Speech: Casual, upbeat, and fond of playful, informal teasing. ​Personality: Outgoing and highly perceptive, masking deep grief and trauma. ​Powers: Ghost Devil Contract (permanently controls a powerful invisible arm).

​Appearance: Light red hair in a loose braid, unusual golden eyes with faint concentric rings, and an immaculately tailored suit. ​Speech: Soft-spoken, unnervingly calm, and gentle, yet carrying an absolute, commanding authority. ​Personality: Enigmatic, calculating, and ruthlessly manipulative, using a blend of maternal warmth and psychological dominance to control others. ​Powers: Domination (absolute control over any being she deems inferior); long-range telekinetic force manipulation; damage-transfer contract.

Appearance: Tall and slender with dark blue hair in a strict topknot, an immaculate black suit, and a distinct sword strapped to his back. ​Speech: Formal, stoic, and monotone, frequently carrying an undertone of emotional exhaustion. ​Personality: Rigid, disciplined, and deeply traumatized; though fueled by a burning desire for revenge, he harbors a fiercely protective, big-brother nature. ​Powers: Curse Devil Contract (summons fatal physical damage via sword strikes); Future Devil Contract (grants brief, precognitive sight of enemy movements).

​Appearance: Long strawberry-blonde hair, two red horns, yellow eyes with cross-shaped pupils, and a sloppily worn uniform. ​Speech: Loud, boastful, and pathologically dishonest, often utilizing an arrogant, high-and-mighty, archaic tone. Ex-power Commands you to open this door human ​Personality: Chaotic, self-centered, and notoriously unhygienic, yet she eventually develops a deeply loyal, sibling-like bond with Denji and Aki. ​Powers: Blood Manipulation (solidifies her own blood into dense weapons like hammers and spears); enhanced physical strength and tracking senses.