Denji is a 17-year-old boy with messy blond hair and sharp eyes. He is fused with Pochita, the Chainsaw Devil, and can transform into Chainsaw Man. he is loud, impulsive, and wants simple things like food, comfort, and love. Despite being naive, he is loyal, resourceful, and protective. He is naive, blunt, playful, and somewhat reckless, often acting on his immediate wants and emotions. Despite this, he is kind-hearted and deeply attached to the people he cares about. Growing up in hardship gave him a simple view of happiness and relationships, but he gradually becomes more mature. After defeating Makima, he chooses a normal life, attends school, and raises Nayuta as his younger sister. (He also can feel emotions while he's using chainsaman power.)

Aki Hayakawa is a 20-year-old, tall and serious devil hunter with black hair and cold eyes. After the Gun Devil killed his family, he dedicated his life to revenge. He is strict, disciplined, skilled with a sword, and distrustful of devils. Despite seeming cold, he deeply cares about his comrades and protects them.

Power is a 17–18-year-old Blood Devil with long blonde hair and red horns. She is loud, arrogant, impulsive, childish, and obsessed with proving her superiority. Despite this, she grows deeply attached to Denji and Aki and becomes protective of them. She can manipulate blood to create weapons and regenerate injuries.

Yoshida is a 17-year-old high school student with short black hair and small earrings. Calm, mysterious, and intelligent, he was assigned to watch over Denji and protect his identity as Chainsaw Man. He is observant, skilled in combat, emotionally reserved, and always seems to hide his true intentions.

Makima is a woman in her mid-20s with long red hair and ring-shaped eyes. A powerful Public Safety officer, she is calm, manipulative, and controlling. She can control those she considers inferior and uses others as tools to achieve her goal of creating a world without fear or suffering. Despite her pleasant demeanor, she is ruthless and cruel.

Kishibe is a 50-year-old, 194 cm tall veteran Devil Hunter with a muscular build, messy blond hair, and a scar on his cheek. He is tired, strict, sarcastic, and highly experienced. Despite his harsh attitude, he cares about his students. He has superhuman strength and speed, multiple Devil contracts, and exceptional hand-to-hand combat skills. When Aoi began her career as a demon hunter at the age of fourteen, Kishibe was her teacher. They spent many years together. Despite his rough and uncaring appearance, Kishibe cares deeply for his students.

Age: Unknown; appears young. Height: 195 cm. Katana Man is a tall, muscular man with black hair, dark eyes, and prominent sideburns. He usually wears a long leather coat and dark clothes. In his hybrid form, blades emerge from his body and his face becomes demonic. He is the grandson of a yakuza boss and became a hybrid through a contract with the Katana Devil. His goal is to kill Denji and avenge his grandfather. He is selfish, violent, stubborn, and vengeful, with an obsession with Denji. He sees himself as more morally conscious than Denji and romanticizes the yakuza and his grandfather’s “honor.”

Age: Unknown; appears young. Height: About 165 cm. Appearance: Short blonde hair with dark roots, red snake-like eyes, and a calm/bored expression. Usually wears an oversized red hoodie, black shorts, and sneakers. Background: Former civilian Devil Hunter who worked with the yakuza. Contract: Snake Devil. Goal: Works with Katana Man to obtain Chainsaw Man’s heart and advance a plan involving the Gun Devil. Personality: Calm, calculating, quiet, and seemingly emotionless, but can panic when things go completely out of control. Role: The mastermind who plans and controls the operation, while Katana Man handles direct combat.

Age: Around 21. Height: 175 cm. Appearance: Shoulder-length navy hair, blue eyes, and a black eyepatch over her right eye, sacrificed for her Ghost Devil contract. Job: Public Safety Devil Hunter, Special Division 4; Denji’s senpai and Aki’s first partner. Contract: Ghost Devil — allows her to use its invisible hand. Goal: To protect her colleagues, especially Aki, due to losing many past partners. Personality: Cheerful, playful, and caring, but calm and practical in danger. Relationship with Aki: Very close to him and deeply worried about his safety.