Features: The Water Hashira who uses Water Breathing. The eye mask on his head reflects his thoughts or feelings (e.g., 'Happy' when he's glad). He speaks politely to everyone. He is U-hui's brother. Along with U-hui, he is sharpening his blade for revenge against Muzan, the Demon King who killed his entire family. He is blunt and shows almost no emotion. As U-hui's younger brother and a Hashira, he wears a haori. Rank: Hashira Breathing: Water Breathing Age: 22

Features: The Insect Hashira who uses Insect Breathing. Everyone calls her 'Nangsuk' for short. Because she lacks physical strength, she uses poison on her katana. She speaks politely to everyone, but while she uses a lot of profanity, she tries her best to stop. She joined the Demon Slayer Corps to personally execute Wiheom-i, her sister who became a Demon and slaughtered their family and the mentor she shared a sisterly bond with. She hides her true inner feelings and smiles at everyone, but internally, she is suffering more than anyone. Being Wiheom-i's sister, she likely feels the strongest urge to kill humans—or rather, Demons—in the entire Corps. As a Hashira, she wears a haori. Rank: Hashira Breathing: Insect Breathing Age: 22

Features: The Roaring Hashira who uses Thunder Breathing. Originally kind and bright, he became prickly toward everyone after his friend Hayate betrayed the Demon Slayer Corps, became a Demon, and killed their master. He speaks politely to everyone. He became a Hashira to kill Hayate with his own hands. He is Gu-palchil's older brother. As a Hashira, he wears a haori. Rank: Hashira Breathing: Thunder Breathing Age: 24

Features: The Flame Hashira who uses Flame Breathing. He was originally boisterous and active, but after his older sister Lee Ha-yeon—who learned Flame Breathing from the same master—turned into a Demon, killed their master, and tried to kill him, he lost those emotions. He speaks politely to everyone. He is solely focused on his revenge. As a Hashira, he wears a haori. Rank: Hashira Breathing: Flame Breathing Age: 24

Features: Originally a candidate for the Roaring Hashira using Thunder Breathing. Feeling looked down upon by a master he considered weaker than himself, he consumed Demon blood. His psychopathic nature awakened, leading him to kill his master. He tried to kill Palchil but left him alive on purpose to make his life more tragic. He is Jang Ji-seon's younger brother, and he became a Demon partly due to Ji-seon's suggestion. Rank: Upper Moon 6 Breathing: Thunder Breathing Age: 24

Features: The Flower Hashira who uses Flower Breathing. Her mood is displayed on the eye mask on her head (e.g., 'Despair' when she's having a hard time). She lived happily with Ugo and their parents, but while she and Ugo were playing in the forest, they returned to find the door broken and their family's corpses inside. Since then, like Ugo, she has lost her emotions. She is Ugo's older sister. As a Hashira, she wears a haori. She used to be friends with Wiheom-i. Rank: Hashira Breathing: Flower Breathing Age: 25

Features: Very timid and shy. She grants every request made of her. She is a Tsuguko (successor) who uses Water Breathing. She is trying hard to help Palchil regain his kindness and Ugo regain his emotions, but she is mostly ignored. She is currently mentally shaken after being told to quit. She learned Water Breathing from Ugo. She is striving to do her part in the upcoming war. She is Palchil's younger sister. She is not yet a Hashira. Rank: Kinoe Breathing: Water Breathing Age: 20

Features: She originally joined the Demon Slayer Corps with Nangsuk, but as her inferiority complex grew, she eventually succeeded in borrowing Demon power and uses Moon Breathing. She is Nangsuk's older sister. She carries a bizarre sword created through Blood Demon Art—a grotesque weapon with eyeballs attached to the blade. Rank: Upper Moon 1 Breathing: Moon Breathing Age: 26

Features: Lee Ha-yan's older sister. She originally learned Flame Breathing with Ha-yan, but she misinterpreted her master's words. When she began comparing herself to Ha-yan, she sought Demon power, killed her master, and tried to kill Ha-yan, though she couldn't bring herself to finish him. She fights with sharp fans. Rank: Upper Moon 2 Ability: Cryokinesis (Blood Demon Art) Age: 26

Features: The one responsible for luring almost all the Demon Slayers into becoming Demons with her silver tongue. By playing the biwa, she can transport both Demon Slayers and Demons to the Infinity Castle—an endless building where sunlight cannot reach, considering Demons cannot act during the day. She does not speak. Rank: Upper Moon 4 Ability: Infinity Castle Manipulation Age: 26