Zenitsu Agatsuma

thumb|Zenitsu's cowardly nature. Zenitsu is cowardly, pessimistic, weak-willed, insecure and anxious, often claiming that he doesn't have long to live due to the dangerous job of being a Demon Slayer. He has rather low self-esteem despite his talent and strength, even considering himself useless. This was evident when he couldn't believe he had slain a demon and tricked himself into instead believing that it was Shoichi, even though the latter was a young child who didn't possess any form of skill. Zenitsu is in a constant state of fear, and he frequently tries to run away at the sight of danger, claiming he wants to live a modest, normal life instead of that of a Demon Slayer. Due to this, Zenitsu screams and shouts a lot, much to the annoyance of the people around him. He is also shown to be pessimistic at times, especially during Hashira Training, where he lashed out at Tanjiro and Inosuke for viewing the training positively. In spite of his weaknesses, Zenitsu desires to live up to the expectations others have set for him and will try his hardest when he needs to. He holds great respect and admiration for his comrades and his deceased teacher, Jigoro Kuwajima, and his inner focus and drive to avenge him help to wash away his cowardice and second thoughts when he is in a pinch. Zenitsu also hates himself for how cowardly and incompetent he is, despite genuinely striving to better himself. Zenitsu's blatant crush on Nezuko. Zenitsu is also shown to be something of a wannabe womanizer, stemming from a desire to not be single should he be killed. He appears to be severely needy for affection and approval by other people, traits which can be traced back to his younger years as a lonely orphan who was exploited emotionally and financially by his former partners. Such desire influences him to hit on girls who he thinks are cute and asks them to marry him or wants them to care about him, much to their annoyance. He is shown to have perverted traits at times, evidently when he confronts Tanjiro and Inosuke during Rehabilitation Training where he draws attention to a girl’s physical features. This womanizing nature is shown to override his docile and quiet personality, particularly when he believes his comrades are "flirting" with cute girls; he would snap and go on long hysterical rants and complaints. Zenitsu is shown to have a strong attraction to Nezuko, openly expressing his affection for her and always rushing to protect her as if on instinct. During these times, he is also shown to become physically aggressive, lashing out at people in frustration. Though, despite his shallow behaviour in this regard, Zenitsu does show respect for women, telling Daki to let go of a girl that Daki nearly tore the ear off of and later demanding that she apologize, showing no fear at all in front of the enraged Upper Rank demon. Despite his loud personality around others, Zenitsu has shown steadfast loyalty towards his friends and people who treat him with kindness. Throughout the story, Zenitsu remains a loyal companion to Tanjiro and Inosuke; although the two frequently quarrel, Zenitsu reveals to care about Inosuke's wellbeing in moments such attempting to cheer him up after the mission the Mount Natagumo and during the aftermath of Daki's fight. His loyalty to Tanjiro is revealed in the same day as they met when he shares his onigiri with him and when he sacrifices his own body's safety to protect Nezuko's box, as well as during Hashira Training when he overcame his fears to follow Tanjiro's orders to evacuate Genya from his brother's patio. His undying loyalty is best shown towards his late master, as Zenitsu overcame his fears during his time inside the Infinity Castle to fight Kaigaku in order to avenge his master's death. Such loyalty is even shown towards the aforementioned Kaigaku, when he confronted fellow Slayers after he heard them slandering his former companion during their days as Demon Slayers in training. In spite of his cowardly demeanour and somewhat pathetic attempts to gain the attention of women, he has shown level-headedness on rare occasions, becoming annoyed by his comrades' shenanigans, such as Tanjiro's kind naivety, Inosuke's bombastic personality, Kyojuro's boisterous and loud character, and Tengen's self-glorifying proclamations. As such, he typically squabbles with Inosuke when the latter goes on with his loud demands and boasts. Additionally, as the only one to have grown up in the city, Zenitsu is the most street-smart of the trio, being the most familiar with urban environments and Japan's industrialization. As such, he became frustrated with his partners' lack of understanding, namely Tanjiro and Inosuke's inability to recognize a train. thumb|Hurt by grief, Zenitsu reveals a more serious side of his character. Before the battle in the Infinity Castle, Zenitsu's demeanor changed to become more serious, mature and even somewhat cold - as if he is focusing on ...

Zenitsu is a young man of average height with fair skin, a muscular build, and downward-sloped, worried-looking eyes that fade from soft brown to a brilliant gold and golden, forked eyebrows that sharply fade into a warm orange color. He has short, yellow hair of varying lengths, cutting off squarely at the ends where it fades to a darker orange color, that falls in front of his face in uneven bangs, loosely resembling a bowl cut. Before he became a Demon Slayer, Zenitsu's hair was originally black, but it turned the color it is currently when he was struck by lightning during his training. For some time following the battle at Mount Natagumo, his limbs temporarily shrank to Son's poison but were able to return to normal afterward thanks to medicine he had taken developed by Shinobu Kocho. Zenitsu wears a golden brown variation of the standard Demon Slayer uniform, which consists of a golden brown button-up jacket with a stand-up collar and long sleeves, featuring silver buttons and a shirt pocket on the left breast, with the kanji for |Metsu}} engraved on the back of the uniform. Underneath the jacket, he wears a white long-sleeved collared undershirt. A white belt is tied around his waist, securing a pair of matching golden brown tattsuke-hakama pants that are wrapped at the calves with his distinctive, bright yellow-to-orange gradient kyahan. These kyahan are tied in the front with three white bows and bear the same white-triangle pattern as his haori. Zenitsu also wears golden brown tabi socks and a pair of white zōri sandals with white straps. Over his uniform, he sports his signature haori, a bright yellow-to-orange gradient decorated with a repeating white triangle pattern. As an adult, although he drew himself as a tall and sleek man with a prominent moustache, he actually had a plump and puffy figure and grew little facial hair.

Overall Abilities
Zenitsu decapitates a demon instantly. From the beginning, Zenitsu comes off as a talented and skilled Demon Slayer, though he denies this. His strength awakens when he is asleep, as his nervous demeanour is what normally keeps him from accessing his abilities, making him more sagacious, calm, and precise in combat. This allowed him to instantly decapitate the Tongue Demon and defeat the Son of the Spider Family by himself. He was later able to defend three entire train carts being attacked by Enmu, Lower Rank One, along with Nezuko. A few months after that, he was able to go toe-to-toe with an awakened Daki with the assistance of Inosuke, and later managed to blitz her with Thunderclap and Flash: Godlike Speed. As further credence to his strength, Zenitsu was able to advance to the highest point of the Hashira Training. thumb|Zenitsu singlehandedly killing an Upper Rank demon.|left However, the greatest extent of his powers manifests when Zenitsu fights while awake, as he managed to outmatch the new Upper Rank Six, Kaigaku, in speed by himself and was later blitzed and decapitated before he could react, although he had still sustained several severe injuries. Moreover, Zenitsu's initial reluctance to kill Kaigaku came from recalling how he was once someone he cared about and looked up to, was the only thing that gave the Upper Rank the initial advantage, hinting that he could have simply killed him from the beginning if he so desired. Later on, he could keep up with and battle the Demon King, Muzan Kibutsuji, albeit while severely weakened by the Anti-Kibutsuji Drug. Nonetheless, Zenitsu's strength more than likely matched that of the Hashira by the end of the series. Zenitsu's indomitable willpower. Indomitable Will: In spite of his initial cowardice and reluctance to fight, Zenitsu nonetheless possesses indomitable willpower and spirit. This was displayed when he absolutely refused to let Inosuke kill the demon inside Tanjiro's box and protected it to the end despite getting relentlessly beat up by Inosuke. While he was asleep, during the battle against Daki, Zenitsu had the willpower to continue fighting despite sustaining numerous slash wounds all over his body and having his feet broken. Through sheer will and anger, Zenitsu was able to overcome his cowardice and stay awake in battle against demons, as shown during his bout with Kaigaku and Muzan, especially in the fight with the latter, in which he refused to give up and persisted despite being enervated and injured. Tactical Intellect: Even when fighting unconscious, Zenitsu has displayed incredible judgement and tactical intellect. When fighting consciously, this ability is fully released. This ability was best exhibited during his battle against Upper Rank Six, Daki. When Inosuke made an erroneous deduction about her weaknesses, Zenitsu correctly explained that all they needed to do was keep both demons' heads disconnected to kill them. After his bout with Kaigaku commenced, he was able to clearly think and process his techniques and demonic abilities. Unconscious Combat: Zenitsu has the ability to fight when he sleeps, which allows him to awaken his true strength. While awake, his nerves and fear cause him to freeze up, so he cannot move. When his life is in danger, his nerves and fear grow so strong that he passes out. But while asleep, his nerves are no longer holding him back, allowing him to fight and move with great judgement, precision, and skill. His hearing also plays a big part in allowing Zenitsu to fight unconsciously, as it enables him to discern his surroundings and the location of his enemies and their attacks. This also allows him to fight even after he falls victim to Enmu's spell, which makes anyone go into deep sleep.