In an all-new piece of draw-dropping fan art, Demon Slayer's Zenitsu is shown to have become a demon, one that is exploding with corrupt energy! While he is normally depicted as a powerful Demon Slayer, Zenitsu becomes a demon himself in powerful new fan art.
Fans have wondered whether Zenitsu ever got to realize his dream of becoming a Hashira at all. Unfortunately, the answer to this question would be, no, he did not. Zenitsu, along with Tanjiro and Inosuke got way stronger than average corps members with training.
In fact, he's upset — he was hoping he would die and get out of having to fight demons. He's not at all confident in himself, often repeating that he "knows he'll die soon" and "it's only a matter of time."
There are six forms, but Zenitsu could only learn the first form said to be the basis for the others yet he honed it to where he could fight against several strong demons. He later created a seventh form and defeated his former senior who had become the Upper Rank Six of the Twelve Kizuki.
Zenitsu Becomes The Thunder HASHIRA - Full Story & Powers ⚡ How STRONG is Zenitsu in Demon Slayer?
What is Zenitsu 7th form?
Seventh Form: Flaming Thunder God) - The personal creation of Zenitsu Agatsuma. The user dashes forward at blinding speeds and unleashes a singular forward slash at a low stance, which is seemingly accompanied by a yellow Japanese dragon shaped like a lightning bolt.
Kaigaku realizes that Zenitsu is much more versatile and skilled with his swordsmanship than before. However, he still believes that no matter how much Zenitsu trains, he can never defeat an Upper Rank like him. Zenitsu then is slashed by Kaigaku with the Thunder Breathing, Second Form: Rice Spirit.
This wasn't the case with Zenitsu, whose mastery of Thunderclap and Flash is clear for everyone to see. This mastery allowed Zenitsu to form a Seventh Form of Thunder Breathing that is unique only to him: Honoikazuchi no Kami.
Exploring Zenitsu's fighting abilities in Demon Slayer
Zenitsu has perfected the first form only and is seen performing it only when he's unconscious. But the manga shows that he can fight without fainting or going unconscious. Later in the manga, Zenitsu fights an Upper Moon 6 demon named Kaigaku.
Seventh Style - Flaming Thunder God: This is the seventh form that Zenitsu created himself. The user creates a dragon-like creature emitting fire and thunder. This form alongside God Speed allows Zenitsu to move extremely fast, allowing him to defeat upper moon six, Kaigaku.
This might be a little difficult to digest, but Zenitsu is not one of the fastest characters in Demon Slayer. He certainly has speed and was able to keep up with Daki during the Entertainment District arc.
So in a nutshell, Zenitsu wasn't able to master the other five forms, but later in the Infinity Castle Arc, during the battle with Kaigaku, Upper-Rank Six Demon, he created a Seventh Form: Flaming Thunder God.
Zenitsu has honed this ability to the extent of being able to repeat the dash multiple times in quick succession. He usually goes for Six Fold, which means six dashes but has been able to use Eight Fold to dash eight times within one use of the technique.
At one point or another in the manga, all nine Hashira in Demon Slayer encountered an Upper-Rank. Of the three Hashira who were killed by Upper-Ranks -- Rengoku, Shinobu and Tokito -- Shinobu was the only one who was killed almost instantly when she encountered Doma, Upper-Rank Two.
After all the Hashira, Inosuke and Zenitsu were knocked down by Muzan Kibutsuji, Kanao remains the sole fighter in the field despite being on her knees, drenched in blood and her Nichirin Sword is broken.
Giyu continues telling Tanjiro he must fight and become stronger if he wants to save his sister, before internally sympathizing with Tanjiro. Giyu stabs Nezuko in a non-fatal way, prompting Tanjiro to throw a snowball and rush at Giyu.
Towards the end of the fight, the main antagonist of Demon Slayer, Kibutsuji Muzan, perishes. Moments before dying, he reaches for Tanjiro and transfers all of his blood into his body. Just before injecting blood into Tanjiro, he stopped breathing and was dead for a few seconds.