Stiffening

Stiffening (硬質化) is a Quirk used by Shikkui Makabe.

Description
This Quirk seemingly allows Shikkui to harden held objects.

Shikkui can make anything he touches harder than concrete. This is done by rubbing or kneading the objects together with both hands.

This Quirk has no effect on living beings.

Trivia

 * This Quirk is the inverse of Hardening, which only allows the user to harden their body.