The Quirk is perfectly divided between Shoto's right and left sides of his body.
Right-side: From his right Shoto can drastically lower temperatures, and freeze anything he touches. He has very precise control and direction, capable of freezing entire building and streets, and making giant glacier-like walls of ice, or restricting it enough to create a path for himself. However, prolonged usage of his right-side can lower his body temperature to dangerous level, leading to frostbite. His maximum out put brings him to his limit almost immediately.
Left-side: From his left Shoto can drastically increase temperatures and release scorching hot flames. Because of his animosity towards his father, Shoto held off on using his left-side offensively for a long while and doesn't have as fine control over it as he does his right. Because of this, adjusting the temperatures of his flames is difficult for him. It is also possible for him to overuse his left, as with his right, but the repercussions are not currently know.
Fortunately, Shoto is capable of using his other side to counteract the dangerous effects of which ever one he happens to be overexerting. He is also capable of activating both simultaneously, but lack of practice has made this awkward for him, and it dulls his movements.
- Giant Ice Wall (大氷壁 Daihyōheki?): Shoto creates a huge, glacier-like wave of ice. This move is first used in his battle against Hanta Sero in the Sports Festival, but is unnamed until the End of Term Test. A variation of this move, slightly smaller in size, is shown in his battle against Katsuki Bakugo.