This is a posable action figure from the Nendoroid series.
From Good Smile Company:
From the popular anime series "My Hero Academia" comes a Nendoroid of Tomura Shigaraki, the leader of the League of Villains. The numerous hand parts that cover his body are all removable. He comes with two face plates including his scornful standard expression and a spine-chilling crazed expression.
Special hand parts to display him using his 'Decay' Quirk are included along with interchangeable front hair parts, allowing you recreate all kinds of scenes and situations.
Be sure to add him to your collection, and enjoy recreating your favorite scenes from "My Hero Academia"!