Eijiro is a muscular young man of average height, with a rather impressive physique, despite his young age. He has red eyes that are pointed slightly inwards, a small scar just above his right eye which Horikoshi admits he frequently forgets to draw, small eyebrows and very pointed teeth. His hair is reasonably short, dyed a bright red, and spiked away from his head at all angles with gel, two more pronounced tufts spiked on either side of his forehead like little horns, this lofty style taking a full 3 minutes to set. In his middle school days, however, his hair was black and left in its natural state: just under shoulder-length with some shorter bangs between his eyes, but he changed it to his current style shortly after being accepted into U.A..
During school, he wears the normal U.A. uniform, just with dark red trainers on his rather than the usual brown dress shoes.
In his hero costume, he wears two gear-shaped shoulder pads, dark red in color, a jagged sash joining the one in his left to the right side of his belt, which has a red “R” set into its centre, standing for his hero name, “Red Riot”. Below this he wears baggy black pants and half cape with a ripped hem, also sporting black boots, multiple thick rings going around his calves. He leaves his chest bare, and wears a wired guard around his face, reaching from just above his hairline to below his jaw, an extra piece going over the bridge of his nose, some spiked pieces around his mouth which resemble little fangs. This look overall makes him look a little like an Oni, which is a troll-like creature commonly seen in Japanese folklore, but whether this was purposeful or not hasn’t been confirmed.
Eijiro is a boisterous and outgoing guy with a fondness for the concept of manliness, often using the terms "manly" and "unmanly" to describe things and people he does or doesn't like. Those who showcase a noble, brave, and/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. He is also a big fan of Crimson Riot, a retro hero that he takes inspiration from, including his own hero name.
Eijiro is very honest and kind-hearted, with All Might praising his heroic spirit. In addition, he seems capable of making friends with most people, as he is one of the few classmates who is friends with both Katsuki Bakugo and Izuku Midoriya. Eijiro is very dedicated to his friends and is even willing to break laws and rules in order to help them, showing regret if he becomes unable to aid in any way. This sometimes leads to Eijiro being very harsh on himself.
Eijiro has stated more than once that he does not think very highly of his own Hardening Quirk, thinking that it lacks the flashiness usually found in the Pro Hero scene. In fact, he will get downright offended if he finds someone with a similar Quirk. Eijiro also has concerns about not having a good enough Quirk for Hero work, worried that his skills could not compare to the others'. A lot of this self-doubt seems to have come from an incident in Junior High when Eijiro saw Mina stop an underclassman from being bullied and save some students from a threatening figure. Eijiro's friends pointed out that Mina will easily become a Hero due to her outgoing personality and athletic nature. After this, Eijiro thought of himself as dull and boring.
Regardless, in the present, Eijiro is a more confident and hot-blooded fighter, having decided to reinvent himself after being accepted into U.A. High, although he's still not as fiery to the same degree as Katsuki. However, he does not shy away from comparing himself to Katsuki, with Izuku stating that the two have managed to develop a relationship between equals. Because of this, Eijiro is notably one of the few people that Katsuki holds in higher esteem.
Enhanced Strength: While using his Quirk, Eijiro's physical strength appears to increase. He demonstrated it multiple times during the Sports Festival, first digging through several tons of metal scraps, then withstanding Katsuki's explosions without stumbling, which, according to the latter, was not due only to Eijiro's armor. In his arm-wrestling match against Tetsutetsu, his fingers dug through concrete and he eventually broke the surface the match was taking place on. He was also able to break multiple metal blades with a single elbow strike, as well as to destroy a wall with Izuku's help.
Enhanced Durability: Eijiro has enhanced durability thanks to his Quirk. His Hardening was able to withstand Katsuki's explosions for an extended amount of time and allowed him to emergence from the remnants of the huge faux villains that fell on top of him completely unscathed.
- Red Counter (
烈怒交吽咤Reddo Kauntā?): While hardened, Eijiro endures a close-range attack with his skin and then counters with a straight punch.
- Red Riot Unbreakable (
烈怒頼雄斗 安無嶺過武瑠Reddo Raiotto Anbureikaburu?): Eijiro reaches his maximum hardening level by turning his entire body extremely hard and rugged, leaving him with a monstrous appearance and practically invulnerable to most forms of attack. This form can only be maintained for around 30 to 40 seconds.
Battles & Events
- In the preliminary stages of the manga, Eijiro's early design was very similar to his current appearance, aside from a few rough features.
- Eijiro's name contains the kanji for cut (切?) and sharp (鋭?).
- Eijiro's known U.A. data is as follows:
- Eijiro's rankings in the Popularity Polls are as follows:
- Eijiro likes meat and manly things.
- Horikoshi mentions that Eijiro was made to tie the class together with his personality.
- While Eijiro officially debuted in Chapter 5, he actually makes a small cameo in Chapter 3, sporting his original middle school appearance and fighting some Villain Bots.
- (To his classmates about Katsuki Bakugo's kidnapping) "When I heard that they were after my buddy...I couldn't do anything!! I didn't do anything!! If I don't act now...forget being a hero, I'm not even a man!"