Disclaimer I do not own Demon Slayer or My Hero Academia
Notable Users in both Canon and Fanon: Kyojuro Rengoku, Mitsuri Kanroji(kind of), Senjuro Rengoku, Enji Todoroki, Touya Todoroki, Shoto Todoroki, and Shoka Todoroki
Flame Breathing is one of the original breathes derived from Sun Breathing. Developed in the Sengoku Era and honed overtime by many Flame Hashiras. Flame Breathing is the perfect mix between offensive and defensive with the fighting style mainly consists of fast takedowns rather then drawn out fights. The current Flame Hashira is Enji Todoroki. The sword for a flame user are red on the edge, do not get it mixed up with the red blade that is unlocked with the demon slayer mark. They do not hold the same properties. Rumor has it though is that Flame Breathing is the closest Breathing technique to Sun Breathing.
Flame Breathing consists of ten forms. (A/N forms 6-8 and ten were made by me. Because 6-8 are not once used throughout the series nor on the wiki so I'll just make them. I was going to make a tenth anyway.)
1st form, Unknowing Fire. The user charges at their opponent at high speeds with intent for a quick beheading.
2nd form, Rising Scorching Sun. Arching uppercut slash with intent to behead the opponent.
3rd form, Blazing Universe. A downward swing in arc that is meant to disarm the enemy or behead depending on position.
4th form, Blooming Flame Undulation. The user swings in a circular motion to defend themselves from attacks or to kill multiple enemies.
5th form, Flame Tiger. Powerful series of sword slashes that take the form of a flaming tiger that charges at blinding speeds.
6th form, Flash Fire. The user charges at the opponent at high speeds which after reaching the target the user unleashes two monk cuts parallel to each other at the space connecting the collarbone and neck.
7th form, Devouring Inferno. The user leaps into the air and crashes down with a overhead strike that destroys the surrounding area and covers it with flames. Meant to intimidate opponents or soften the user's landing.
8th form, The Dying Ember of a Hearth. The users lunges at the target at high speeds and gracefully behead the opponent who has given up. Meant to be painless but not comforting. The least used form of Flame Breathing.
9th form, Rengoku or Purgatory. The user charges at the target at high speeds while taking the form of a dragon thing. The user goes into a high stance after they appear in front of the target then performs a strike for the neck if blocked or redirected the user keeps swinging for it without fail. The Original Ultimate move for Flame Breathing.
10th form ????
Esoteric Art- Basically the equivalent of Plus Ultra or go beyond your limits. That's all.
A/N For now I'll just post the chapters once I'm finished with them until after school or during winter break. I'll keep ya posted