While not canon, Tenrai-Sensei proposed that the missing link between Sun Breathing (Hinokami Kagura) and the derivative forms (Water, Flame, Wind) is a psychological foundation. In a three-part, four-hour documentary, Sensei laid out:
Fans often write these characters into the Taisho Era history, positioning them as retired Hashira or survivors of previous Upper Moon encounters who now pass on their techniques in secret. Official Masters in Demon Slayer -Tenrai-Sensei- Demon Slayer- Kimetsu no Yaiba ...
Putting them together, creates an image of a "Divine Teacher." This is a character archetype that fans constantly crave: a mentor figure who is not only powerful but possesses a spiritual connection to the origins of the Slayer arts, perhaps even rivaling Yoriichi Tsugikuni, the inventor of Sun Breathing. While not canon, Tenrai-Sensei proposed that the missing