Bakugo Katsuki.

Katsuki Bakugo (爆ばく豪ごう勝かつ己き, Bakugō Katsuki?), also known as Kacchan (かっちゃん, Katchan?) by his childhood friends,[2] and his hero name Great Explosion Murder God Dynamight (大だい•爆ばく•殺さっ•神しんダイナマイト, Daibakusasshin Dainamaito?),[3] is a student in Class 1-A at U.A. High School, training to become a Pro Hero. He is the deuteragonist of the series.

Katsuki is a young man of average height, with a slim, muscular build, and a fair skin tone. He has short, spiky, sandy blond hair with choppy bangs that hang over his eyebrows. His eyes are sharp and bright red in color.

At school, he wears the standard U.A. uniform without the customary red tie. Underneath his blazer, he wears a white collared shirt with the top few buttons undone. His pants are worn loosely, causing them to sag at his ankles, despite him wearing a belt with them. After the Paranormal Liberation War, Katsuki's school uniform is worn in a much neater fashion and includes the red tie he previously forgone.

His hero costume is composed of a tight, black, sleeveless tank top, with an orange "X" across the middle, forming a V-neck. There are two dots along the left line of his collar, indicating the support company that designed his costume.[4] His costume also has a metallic neck brace worn with rectangular ends that have three holes on each side. His sleeves reach from within his large grenade-like gauntlets to his biceps. His belt, which also carries grenades, holds up his baggy pants with knee guards, below which he sports black, knee-high combat boots with orange soles and eyelets. His mask is jagged and black, and as it goes around his eyes, a large, orange-rimmed flare shape protrudes from each side.

In the winter months, he wears a large jacket with a high collar, rather than the usual tank top, although it does have the same orange "X" design, so he can still sweat a sufficient amount, which is how his Quirk works.

Katsuki is a crude, arrogant, short-tempered, and aggressive person, especially at the beginning of the series. Katsuki tends to come off as unheroic; this problematic behavior going all the way back to his early childhood days when he was known to bully a young, Quirkless, Izuku Midoriya. He showed to be extremely arrogant and condescending to those around him, often bragging of his Explosion Quirk's power, and even boasting that he would take on his entire middle school class. He showed open hostility towards Izuku, mainly because of his former Quirkless status, and would frequently put down his dream of becoming a Hero, despite lacking a Quirk, and also gave him the insulting nickname "Deku" (meaning useless and unable to achieve anything). He even threatened Izuku not to apply to U.A. High School and became angry upon both of them passing the Entrance Exam, wanting to be the only person from his middle school to make it there.

However, after being accepted into U.A. and experiencing several personal defeats, one of them even coming from Izuku, Katsuki has gradually changed into a less antagonistic person, albeit still retaining a lot of his unpleasant traits. While often portrayed negatively, Katsuki's fierce character and competitive drive have actually granted him an important role among Class 1-A, as a sort of inspirational mood-maker.

Determined and thirsty for victory, Katsuki smiles eerily when in the middle of a battle. He is incredibly focused on achieving his own authentic victories and has learned to never underestimate his opponents. Katsuki is not only very athletic and talented at fighting, but also very intelligent and extremely perceptive, capable of strategic planning and improvisation. Moreover, Katsuki's grades are among the highest of his class and he already knew how to read perfectly by the age of four, evidence that he treats studying seriously. Katsuki also possesses surprising talent in other areas, such as cooking and music, even though he doesn't show a particular interest in them. Overall, Katsuki is considered a natural-born genius with the potential to be one of the best Pro Heroes around.

While a rather volatile hero-in-training, Katsuki is smart enough to discern who his enemies and allies are. He is not particularly nice or open with people who are on his side, or anyone else for that matter, but will act less unfriendly and sometimes even kind to those that manage to earn his respect. Because of his attitude and vulgar language, Katsuki's U.A. classmates often react negatively to him, although they have come to appreciate his skills and warm up to his personality. Katsuki matures slowly through his time at U.A., coming to befriend some of his classmates and willingly engaging in social interaction with them, though remaining solitary for the most part.

Like with Izuku, Katsuki has a habit of bestowing insulting nicknames upon others, such as calling Tenya Ida "Four Eyes" because of his glasses, Denki Kaminari "Dunce-Face" because of how his Electrification Quirk dulls his thinking, Shoto Todoroki "Half and Half" or "Icy-Hot" because of his dual Quirk and appearance, and so on. He also refers to people he doesn't know as "Extras" treating them as little more than fodder or stepping stones to his victory until he faces them head-on. Despite this, he can address others properly when it matters, such as when he's serious or in the heat of battle.

Katsuki tends to disregard the notion that Quirks shouldn't be used in public and will activate his Quirk for a number of reasons, such as to intimidate someone, to punctuate a point, out of frustration, or even if he just feels like showing off. Overall, Katsuki doesn't seem to care very much about what others think of him, barely containing himself from violent behavior (although he avoids other typical delinquent practices like underage smoking). Katsuki values honesty highly and never lies to the point his brash candor is seen by some as rude and insensitive. He is never afraid of speaking his mind and will notice when people are not being truthful to him. This shows that, despite his anti-social habits, Katsuki is an excellent judge of character, making it hard to deceive him.

Due to the constant praise of his abilities and powerful Quirk, Katsuki has developed a superiority complex, and because of that, he desires to be the first and best at everything. As pointed out by many people, Katsuki loves to win above all else and cannot stand it when he doesn't, leading him to lose his already short temper or, less often, sulk. He is fiercely competitive and will never settle for less than the number one spot, having a compulsive need to always strive for victory and also prove people who doubt him wrong. However, Katsuki also values hard work and fair play, to the point of refusing to acknowledge a winning result if he feels that his victory was not earned by actual merit. Along with that, he detests being pitied or looked down on by others, and will hold contempt towards those that don't take him seriously, while recognizing the effort of those that manage to put up a challenge against him, like, for example, Ochaco Uraraka and Eijiro Kirishima.

Because of his Quirk and talents, Katsuki is very confident and brave to where he is willing to go against anyone who challenges him. He never backs down from a fight and will go out when facing such a powerful opponent. From taking on several villains at the Unforeseen Simulation Joint, Katsuki knows when dealing with someone that is out of his league, as he let All Might face off against Nomu. During the First Term Final Exam, Katsuki wasn't afraid to go up against All Might, even though he knew he had a low chance of taking him down head on.

Katsuki is immensely prideful and prefers to act alone, as he hates the idea of being protected or having to rely on other people to assist him unless, in the latter's case, he is recognized as the unquestionable leading figure within a team. At the beginning of the series, Katsuki's cooperativeness was nothing short of atrocious, often ignoring his partners' ideas and suggestions for his own very direct approaches. His teamwork skills gradually improve as the series progresses, even if Katsuki keeps coming off as condescending through his usual tone. However, it's clear he now acknowledges their importance, protecting them from harm while expecting them to do the same for him in return. As a leader, Katsuki is a merciless perfectionist, and will only become satisfied with complete, indisputable victories.

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