ALL MIGHT

Toshinori Yagi, also known as All Might, is the former No. 1 Pro Hero of Japan, who bore the title of the world's Symbol of Peace. He taught Foundational Hero Studies at U.A. High School, and now serves as the school's vice principal eight years after the Final War.

In his empowered form, All Might is a towering figure with a powerfully muscular and well-defined physique, resembling a classic Western comic book superhero. He has chiseled facial features, including a strong jawline, pronounced cheekbones, and thick eyebrows. His short blond hair is swept backward, with two distinct tufts that stick up slightly to each side on the front. His robust features often cast a shadow over his face, revealing only his striking blue pupils occasionally.

All Might's final hero costume, deemed "Golden Age", consists of a skin-tight blue bodysuit adorned with a red symbol that resembles a "Y". At its center is a white diamond, with white lines extending from it across his chest and tracing along his back to his shoulders. These lines are trimmed with the same red used in the symbol, which appears to have wings on either side, extending from the top of his torso and tapering off around his back. Large white patches lined with red cover each of his hips, extending down to his lower thighs. He wears a yellow belt with a silver buckle featuring red eyes. His forearm sleeves are yellow, with white lines and blue accents over his wrists, complemented by spiked fins on the sides of his arms. Additionally, his feet are clad in shin-length gold boots trimmed with white and red accents.

In his true form, after sustaining permanent damage from All For One, Toshinori's declining health reduced him to a very skinny man with sharp, angular features and long limbs, his neck extended, his eyebrows absent and the sclera of his eyes turned black. His hair is wavy, with two long strands coming down from his hairline and framing his face. He possesses a large scar covering most of the left side of his chest, having lost his stomach and some of his lungs' respiratory system. It is common for him to spout blood from his mouth when excited or surprised. He typically wears baggy clothing to accommodate the change in body mass between forms, but after Toshinori's tenure as a hero, he starts wearing clothes that fit him in his regular form, as he no longer needs big clothes that fit his muscle form.

All Might's hero persona appears to be derived from comic book superhero stereotypes: exuberant and filled with dramatic flair. He always protects and saves innocent people with a huge smile. The habit of smiling was ingrained in him by his mentor, Nana Shimura, who believed that the ones who smile are the ones who are the strongest. Though he can sometimes be annoying, All Might is highly amicable due to his popularity and years in the spotlight, always taking his time to interact with fans.

Once All Might reverts to his true form, he becomes reserved and solemn, avoiding attention in direct contrast to the grandiosity of his hero identity. While he's an optimist, he still ensures his goals are grounded in reality. When a Quirkless Izuku tells him about his goal of becoming a hero, All Might commends him for having a dream but reminds him to stay realistic and suggests he enter another profession that helps people. He considered the harsh words necessary to save the boy from long-term frustration. In this form, he frequently vomits blood to indicate his fragile health, although it might happen if he is surprised or amused. Regardless of which form All Might is currently taking, two personality traits always present in him are his optimism and oafishness.