Description
Ogi Zenin'sOgi ZeninSpecial Grade 1 · HumanA Zenin clan elder who attempted to execute his own daughters, Mai and Maki, inside the clan's cursed warehouse. His Blazing Courage technique wrapped his blade in intense flames. ... technique wraps a katana blade in intense flames, turning an ordinary sword strike into an incinerating slash. The fire burns hot enough to cause severe burns to sorcerers, and the combination of cutting edge plus fire damage makes each hit especially punishing. The technique suits Ogi's fighting style, he's a trained swordsman who relies on clean, decisive cuts rather than flashy cursed energy attacks.
Usage in combat
The technique saw its most dramatic use in the worst possible context. Ogi turned Blazing Courage on his own daughters, Mai and Maki, inside the Zenin clan's cursed warehouse. He cornered them in a hallway of flames and burned Maki severely, fully intending to kill both.
The aftermath is one of the series' most consequential moments. Mai sacrificed her life through 
ConstructionConstructionInnate TechniqueOne object. One lifetime. That's the deal. Construction lets the user build a single real, permanent, physical object from cursed energy, but creating it burns every drop of cursed... to forge Maki a weapon, and Maki's latent Heavenly Restriction activated in full. When Maki emerged, physically remade into something comparable to 
Toji FushiguroToji FushiguroHumanThe Sorcerer Killer. Born into the Zenin clan with a Heavenly Restriction that traded every drop of cursed energy for a perfected physical body. Toji couldn't see curses, couldn't .... Ogi's flames couldn't touch her. The man who burned his daughters alive was killed by the weapon one daughter created and the body the other was reborn into.
