Ignition keeps a small flame burning at the crown of Moyuru Tochi's head and lets him spit fire on demand. Feed the same Quirk a dose of Trigger and the modest flicker spreads down his torso, turning a short range power into something far angrier.
Moyuru Tochi carries this Emitter Quirk, a power original to Vigilantes. It appears from the very start of that series, in its first chapter and its first episode. Before the name settled, the Quirk went by Flame.
Fire is the whole of it. A small blaze sits atop the user's head as a permanent fixture, and Moyuru can breathe out fierce flares from his mouth, which is where the offense comes from at close quarters.
Trigger changes the picture. Under the drug his flames climb across his upper body rather than staying confined to his head, and the fire he produces grows considerably stronger.

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Ignition is an Emitter Quirk belonging to Moyuru Tochi in the Vigilantes spinoff, keeping a small flame permanently burning atop his head while letting him breathe fire from his mouth.
Moyuru Tochi is the only known user of Ignition, and the Quirk was originally called Flame before its name settled.
Under the drug Trigger, Moyuru Tochi's Ignition flames spread down across his upper body instead of staying at his head, and the fire he produces grows considerably stronger.
Ignition debuts in the very first chapter and episode of My Hero Academia: Vigilantes.
Ignition is classified as a short range Quirk, since Moyuru Tochi's fire comes from breathing flares out of his mouth at close quarters.
Looking for more on Ignition? The Dragon Ball Wiki on Fandom has a dedicated page with community notes.
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