Grenadier Bracers

Dark green with silver trim, these two bulky arm units are shaped after grenades and function much like storage tanks. They were folded into Katsuki Bakugo's hero costume as a specification rather than an afterthought, and the English dub of the series renames them the Grenade Gauntlets.

Their reason for existing is straightforward. Katsuki wanted to let loose at full scale without wrecking himself in the process, and the gear takes on the burden his body would otherwise absorb.

Each unit collects Katsuki's sweat and holds it until the reserve is full, wringing everything Explosion has to offer out of the accumulated fuel. Yanking the pin dumps the lot in one enormous discharge. The Battle Trial gave an early demonstration of the scale involved, when a single release came close to leveling the building he and Izuku Midoriya were fighting inside.

Damage opens another option. A ruined bracer can be thrown at a target and set off as an external blast, which is what Katsuki did to the Serpenters during their fight.

Katsuki is the intended owner, and his athletic conditioning means the recoil barely registers with him. Izuku borrowed one at the First Term Final Exam to fire on All Might, and afterward complained that the kickback had punished his shoulder.

The design has been reworked more than once. The World Heroes Association issued Katsuki a stealth costume for the Otheon leg of Mission: Humarise, and the bracers were restyled as flashbang grenades to match. Eight years past the Final War, he revised them again, trading the grenade silhouette for something closer to smoke canisters.