Zenitsu Agatsuma/Synopsis

History
When Zenitsu was a young boy, he was financially supported by a woman who owned a lot of debt. She had eloped with Zenitsu, which got him into troubled and it was 'Gramps', the former Thunder Pillar, who saved him from the trouble.

Gramps decided to train Zenitsu along with his eldest disciple, Kaigaku. On one of the days during his training, Zenitsu climbed up a tree because he felt that he was disappointing Gramps, when suddenly, a stroke of lightning hit him, causing his hair to turn blonde.

Zenitsu and Kaigaku hated each other; however, Zenitsu respected Kaigaku and treasured him. Zenitsu eventually wished to fight alongside Kaigaku one day, and thus he created a seventh style, '' 'Breath of Thunder, Flaming Thunder God'. ''

Final Selection Arc
Zenitsu is first seen at the begging of the Final Selection at  Mt. Fujikasane.

After the Final Selection, Zenitsu is among the four people who have passed. Zenitsu is seen talking to himself; fearing he will die one day. Each receive a Kasugai Crow; except Zenitsu who gets a Sparrow. All four are told to choose what ore they want their sword made out of.

Drum House Arc
Zenitsu is seen begging a random girl to marry him. Tanjiro stops Zenitsu, and excuses the girl. Zenitsu explains that he must get married before his next mission, because he might die; he asks Tanjiro to protect him until he gets married. Tanjiro asks him why he became a Demon Slayer. Zenitsu got swindled by a woman, and racked up debt. An old man paid off his debt, and trained him.

Later on, the two share a rice cake as they travel to the south for their next mission. Zenitsu and Tanjiro arrive at a large house in the woods. Tanjiro smells an unfamiliar scent, and Zenitsu hears a strange sound. There are two kids nearby, frozen with fear. Tanjiro shows them Zenitsu's sparrow; to try an calm them. The kids tell them about a monster who has taken their brother inside that house, and that they tracked the monster here. Tanjiro insures them that him and Zenitsu will rescue their brother, and defeat the monster.

Zenitsu asks about a non stop sound of a tsuzumi strike. Once the rest finally hear it; a bloody body is thrown out of the house, and lands infront of them. The body is not that of the children's brother.

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Зеницу Агацума