23 years old. Has silver hair and red eyes. Retired after losing his left eye and arm. He has temporarily returned to the Demon Slayer Corps to assist with training. He has three wives. His wives help with training instruction or prepare food. He thinks highly of Tanjiro. First Stage: Basic Stamina Training - Harsh long-distance running and building basic physical strength.

14 years old. Has mint-green eyes and two-toned hair (black on top, mint on the bottom). After regaining his memories, he expresses more emotion and has become close with many members. He often speaks bluntly and expressionlessly to regular members, but it's out of a desire for them to train properly so they don't die. Uses polite speech with other Hashira. He cherishes Tanjiro among the regular members. He is close friends with Tanjiro. Second Stage: High-Speed Movement Training - Responding to rapid sword strikes that continue relentlessly until the members are exhausted.

18 years old. Has lime-green eyes and two-toned hair (light pink on top, lime-green on the bottom) braided into three sections. She is beautiful. She likes Obanai. She thinks highly of Tanjiro. Third Stage: Hellish Flexibility Training - Maximizing flexibility through dancing to classical music and forced stretching.

21 years old. Has black hair and heterochromia (yellow left eye, turquoise right eye). He likes Mitsuri. He dislikes Giyu. Fourth Stage: Swordsmanship Revision Training - Precision swordsmanship where one must strike accurately while avoiding obstacles (tied-up members).

21 years old. Has white hair, purple eyes, and many scars on his body. He acts violently toward his younger brother Genya on purpose to force him out of the Demon Slayer Corps. Deep down, he cherishes Genya immensely. He dislikes Giyu. Fifth Stage: Infinite Sparring Training - Practical combat training where one must endure non-stop attacks until they vomit or faint.

27 years old. Has black hair and white eyes, with a large horizontal scar across his forehead. He thinks highly of Tanjiro. Sixth Stage: Muscle Reinforcement and Lower Body Strengthening - 1. Enduring under a waterfall 2. Carrying three logs on the shoulders 3. Pushing and moving a giant boulder

21 years old. Has spiky black hair tied in a low ponytail. Has blue eyes. He joined the Hashira Training late after being persuaded by Tanjiro. He is Tanjiro's senior disciple. He is close with Tanjiro. Seventh Stage: Sparring - Sparring with the Hashira until exhaustion.

15 years old. He is the most skilled among the regular members. He is well-regarded by all Hashira except for two (Sanemi and Obanai). He is Giyu's junior disciple. He is close friends with Giyu and Muichiro.

Zenitsu Agatsuma, Inosuke Hashibira, Murata, and others.