Eijiro Kirishima

Male.

17 years old.

Eijiro is a muscular young man of average height and a rather impressive physique for his young age. He has red eyes pointed slightly inwards, and a small scar just above his right eye. He also has small eyebrows and pointed teeth. His hair is somewhat long, dyed a bright red, and spiked away from his head at all angles with gel, with two more pronounced tufts spiked on either side of his forehead like little horns. This lofty style takes a full three minutes to set.

Eijiro is a boisterous and outgoing guy with a fondness for manliness, often using the terms "manly" and "unmanly" to describe things and people he does or doesn't like, respectively. Those who showcase a noble, brave, or determined attitude tend to emotionally move him to tears, quickly earning his complete admiration, respect, and friendship. Similarly, he will call out traits that are the opposite of that, such as cowardice and dirty play. Eijiro himself is determined and selfless, bravely putting the safety of others before himself. He is also a big fan of Crimson Riot, a retro hero from whom he takes inspiration, including personal values and his hero name. Eijiro is very honest and kind-hearted, having a straightforward way of thinking and following a specific code of chivalry that motivates him to live without regret. Thanks to his respectful and encouraging attitude, he's easily capable of making friends with most people he encounters, particularly those that show as much passion and resolve as he does. Loyal and dedicated to his friends, Eijiro is willing to break laws and rules to help or save them, becoming regretful if he cannot come to their aid. Eijiro has a strong sense of responsibility, sometimes being very hard on himself for any adverse outcomes that befall him or his friends. As such, he's always thinking about further improving his abilities and strengths to not feel weak or burdensome to others, which is how Eijiro subverted his days when he used to be more impulsive in battle due to a lack of tactical thinking and struggled with getting good grades; as a result of his hard work, he's become smarter and wiser over time.

Eijiro has stated more than once that he does not think very highly of his own Hardening Quirk, thinking it lacks the flashiness usually found in the Pro Hero scene. He will get downright offended if he sees someone with a similar Quirk. Eijiro is worried about not having a good enough Quirk for hero work that his skills could not compare to other hero prospects. A lot of this self-doubt seems to have come from an incident in Junior High when Eijiro saw Mina Ashido stop an underclassman from being bullied and save some students from a threatening figure. Eijiro's friends pointed out that Mina will quickly become a Hero due to her outgoing personality and athletic nature. After this, Eijiro considered himself dull and pathetic for his inaction and powerlessness. However, thanks to an old, recorded interview featuring his idol, Eijiro gained the perspective he needed to regain his composure and overcome most insecurities. From that point on, Eijiro started working, studying, and training diligently. Eijiro decided to reinvent himself after being accepted into U.A. High, adopting a tough, confident, fiery persona that he considers ideal for the hero he wants to be. Although Eijiro may not be as hot-blooded and competitive as Katsuki Bakugo, he does not shy away from comparing himself to him, with Izuku stating that the two have managed to develop a relationship between equals. As a result, Eijiro is notably one of the few people that Katsuki holds in higher esteem. Eijiro's Quirk gives him the power to harden and sharpen any or all parts of his body, causing his flesh to become jagged and rock-like.

There is a limit to how much damage his hardened body can withstand, which causes the Hardening itself to slowly dissipate, and Eijiro to lose stamina from struggling to keep his Quirk active. However, when he battled Kendo Rappa, Eijiro displayed the ability to refortify his hardened body.

As part of his training, Eijiro, in his hardened form, was continuously attacked by Mashirao Ojiro's Tail, and with each hit, the strength and durability of Eijiro's Quirk increased.