In fact, from the death of Dismask, those faces disappeared with it, which should have been the atmosphere created by Dismask's intention to suppress those souls with his own small universe and not flee outward. Of course, this is different from the idea that purple dragon said that it was because after Dismask's death, the undead were blinded. What needs to be explained here is that the Purple Dragon belongs to people who have always regarded themselves as righteous, and such people are often incompatible with Dismask's personality who disdains secular morality, and it is easy to produce contradictions and discrimination. Therefore, it is normal for the Purple Dragon to have misunderstandings and prejudices against Dismask.
Dismask collects these souls, but also some children's souls, so is he really killing innocents? Judging from Dismask's usual style, he is a very proud person who disdains to fight with the weak, and from his battle against the Purple Dragon, he is also a person who pays attention to fair duels.
After he pulled out the Purple Dragon Soul, he did not directly split the body, but personally went to Huangquan Birasa to duel with the Purple Dragon, so that the Purple Dragon could lose orally can also explain this. One thing to note here is that Dismask does not always personally go to Huangquan Hirasaka to take care of the enemy, it is only because of the magical resurrection of the purple dragon himself that he is so, usually, the enemy will directly die after being attacked by the corpse gas and become an undead.
Perhaps it is precisely because of the characteristics of this move, coupled with Dismask, who has long been dealing with the undead and has a relatively relaxed view of life and death issues, and the morality in this regard is also relatively vague, so he is likely to ignore the innocent when he performs his mission. However, I think it is more likely that these undead spirits were originally the unjust souls who were persecuted and killed by those evil organizations, but Dismask brought them by the way after completing the mission, because he was not accustomed to the righteous appearance of the purple dragon, he deliberately provoked him, and said that those were all killed by himself, and he felt very honorable.