Enji Kagoshima

Enji Kagoshima, also known as Stone Age Hero: Gray Shade (石器時代のヒーローグレーシェード), is a student in Class 1-A at U.A. High School.

Quirk
Stone (結石): Enji's Quirk gives him the power to harden and sharpen any or all parts of his body, causing his flesh to become a jagged and rock-like substance called Granite.

There is a limit to how much damage his hardened body can withstand, which causes the Hardening itself to slowly dissipate, and Enji to lose stamina from struggling to keep his Quirk active. However, when he battled Haruto Bakagure, Enji displayed the ability to refortify his stone body.

As part of his training, Enji, in his stone form, was continuously attacked by Shota Takoda's Ice Breath, and with each hit, the strength and durability of Enji's Quirk increased.