Zenitsu Agatsuma

By nature, Zenitsu is a coward. He always claims that he doesn't have much time to live due to the dangerous job of being a Demon Slayer. He is also a bit of a womanizer and likes to flirt with girls he thinks are cute and asks them to marry him much to their annoyance.

Zenitsu has low self-esteem, but still wants to live up to the expectations others made of him. However, he was constantly afraid and always cried and ran away. He claims that he wants to live a modest life where he can be useful to someone.

For all his lack of self-esteem, Zenitsu has great respect and admiration towards his comrades and his deceased master, Jigoro Kuwajima. His focus and drive to avenge him helped him overcome his cowardice and self-doubt.

Zenitsu's desire to find a girlfriend and get married is shown to override his docile personality, particularly when he believes his comrades are "flirting" with cute girls, he soon becomes angry and begins to protest and complain hysterically resulting in comic relief situations throughout the play. During these times he has also been shown to be highly aggressive, lashing out in frustrations.

Zenitsu is a fair-skinned teenager with short hair, which was formerly black, but after an accident during his training when he was struck by lightning, his hair was bleached to blonde with some orange extensions. His eyes are a golden brown shade and his eyebrows are thick. His attire consists of the standard Demon Slayer uniform with no customization, wearing a yellow haori decorated with small white triangles.

During the events of Natagumo Mountain, Zenitsu was poisoned by demon spiders which caused his limbs to shrink, although after a brief recovery period, they returned to normal.

Heightened Hearing: Zenitsu's sense of hearing is acute enough to hear even the most distant sound vibrations around him. As time goes on, Zenitsu's hearing allows him to hear even the most hidden thoughts of the person.

Unconscious Combat: Zenitsu becomes stronger when he sleeps. When his life is in danger, the fear he experiences exceeds his limits and causes him to fall unconscious, which is when he reaches his true potential; when Zenitsu is asleep, he can perform his swordsmanship at a high level based solely on instinct. However, as the story progresses, he continues to improve his skills and courage and relies on this ability less and less, beginning to display the same skill and bravery when conscious.

Speed ​​of the Gods (神Yo速Si¿ Shinsoku?) - Zenitsu can use this technique to further increase the speed of his Thunder Flash. The only catch is that you can only use this ability twice per day. After the second time, his legs become useless to the jumpsuit. Seventh Stance: God of Thunder in Flames (YoYoElBuenoSí 火El雷Demasiado神Sí, Shichi no kata: Honoikazuchi no kami ? ) [6] - This stance was created by Zenitsu on his own. The user creates a dragon-like creature that emits fire and thunder. This stance in combination with the Speed ​​of the Gods was what allowed him to defeat his former entertainment partner and Upper Moon Six Kaigaku . Shortly before Kaigaku died, Zenitsu confesses to him that he created this stance on his own in hopes of fighting by his side one day.

Zenitsu was an orphan who had no guidance from any adult. Because of that, Zenitsu fell in love with a girl to whom he gave everything he owned, however she left with another man and left Zenitsu with many debts. In the end, Jigoro Kuwajima paid off his debts and decided to train him as a swordsman.

Zenitsu saw the master as his grandfather, which is why he referred to him that way. He also trained with another partner, Kaigaku. One day, when he was training, he climbed a tree scared and with a negative and crying attitude. At that very moment, a lightning bolt struck him, which made him fall to the ground, but miraculously he survived. This event caused Zenitsu's black hair to turn yellow.

The boy didn't get along very well with Kaigaku. However, he respected him and even confessed to having created his own stance, to fight alongside him.

Zenitsu is first introduced as one of the Hunter hopefuls on Mount Fujikasane. After completing the Final Selection quest, he is seen as one of the 4 survivors, along with Tanjiro Kamado, Kanao Tsuyuri, and Genya Shinazugawa. Zenitsu is shown to have a negative personality, constantly telling himself that he is going to die. At that very moment, everyone is given a Kasugaigarasu; Zenitsu is given a sparrow.