Cannonball

Cannonball (キャノンボール) is the Quirk possessed by Chino Jiro.

Description
Cannonball allows Chino the ability to bodily generate thermo-chemical energy and release it from his skin. This energy is used as thrust to cause his body to be propelled through the air, like his namesake, at great heights and speeds with considerable maneuverability. He can control his speed and direction through sheer act of will. At first he could only release this energy from his feet, but now he can fire it from almost any part of his body, to a wide variety of effects, such as channeling it into bio-kinetic blasts from his hands. His power levels have varied over the years - but at his peak, he has been able to defeat the villain and devastate several city blocks by plummeting to the ground from high altitude.This energy also manifests itself as an i`mpenetrable and virtually indestructible "blast field." He can use this blast-field to function as a personal shield or extending it to encompass others, shape the field around another person to imprison them, or absorb outside kinetic impact into his own energy supply and then re-channel it to increase the bludgeoning power of his blows or create explosive shock waves upon impact. Jirou is also capable of generating the blast field without actually having to blast off, though it takes him extreme concentration to prevent himself from propelling into the air. When he's using his quirk, Jirou possesses superhuman durability due to the energy field that forms around his body. Jirou is able to fly while using his quirk.

Weaknesses
The main weakness of the Quirk is that the more Chino uses his quirk, his legs become sore and start to ache and if he amplifies his quirk too much he can accidentally break through even solid steel or explode people into bits with his quirk's strength.