The attack launched by Tanjiro with the demon-slaying sword prevented the Anger Demon's injuries from recovering immediately and put him in a dilemma.
If Tanjiro had completely split the Anger Demon in half, then the Anger Demon wouldn't have needed to think too much. He could have immediately changed the form of one half of his body and then entangled Tanjiro, preventing Tanjiro from saving people.
Then, he would buy himself time to recover. Because when the Joy Demon was in contact with Tanjiro, not only the Anger Demon, but also the Joy and Sorrow Demons had learned more detailed information about Tanjiro through their connection with the Joy Demon.
Although the Joy, Anger, Sorrow, and Pleasure Demons were independent individuals that had been split from Hantengu's emotions, they were, after all, split from the same individual, so the four still had some connection.
And these connections wouldn't affect their respective strengths. That is to say, if one of them was beheaded, the other three would only learn about this news, and their strength wouldn't be weakened because one of their heads was cut off.
If the Anger Demon chose to change his form, then his entire body would have to undergo deformation, because his body hadn't been completely cut open by Tanjiro and was still in the situation of being in the same individual.
Doing so might instead put the Anger Demon in a more passive situation, because his attack method was to release lightning with the Shakujo. If he changed into a worm form, it would be difficult for the Anger Demon to use and operate the Shakujo.
Because the Joy Demon relied on the sound waves emitted from his mouth as his main means of attack, after his hands and feet were cut off, he could choose to let the severed limbs change their form and launch harassing attacks on the demon slayer.
As for the Anger, Sorrow, and Pleasure Demons, they all relied on weapons to increase their combat ability. Although they all had the ability to change their form, they rarely used it in actual combat.
After all, the demon slayers they had encountered before didn't have the ability to suppress their regeneration and recovery, so in the past, they would immediately regenerate and recover at the first moment they were injured, and they basically wouldn't consider changing their form.
Therefore, only the Joy Demon used this ability relatively more often.
In the end, the Anger Demon still didn't choose to change his form, because he had never used this form to fight.
Tanjiro immediately pulled the demon-slaying sword out of the Anger Demon's body. If the Anger Demon had any major movements at this time, then the blood from his split body parts would spurt out like a fountain. This process would continue until the suppression effect of the demon-slaying sword disappeared.
Tanjiro immediately took advantage of this opportunity to use the lightning-protecting claw that he had cut off from the Joy Demon to grab the Shakujo that was piercing Nezuko's throat. The lightning released on the Shakujo didn't conduct to Tanjiro's body through the Joy Demon's eagle claw.
Then, Tanjiro planned to pull the Shakujo out of Nezuko's throat.
Just as Tanjiro was pulling the Shakujo, the Anger Demon, regardless of the fact that his injuries hadn't recovered, suddenly turned around. Then, under the twisting of his body, the body that had been split by Tanjiro immediately underwent a large-scale dislocation, and blood spurted out like a fountain.
However, the Anger Demon completely ignored this situation and, despite his serious injuries, raised the other Shakujo in his hand and stabbed it towards the back of Tanjiro's neck.
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