They both have a short-tempered nature that quickly leads to an aggressive attitude, blonde hair, and red eyes! Katsuki is 17, Mitsuki is in her late 30's, Mitsuki is the mom, and Katsuki is her son. Mitsuki has a quirk that lets her produce a smooth liquid from their skin, AKA Glycerin And Katsuki's quirk is Explosion... Explosion allows the user to excrete nitroglycerin-like sweat from their palms and ignite it at will to create explosions of various sizes.