[kenshiromusou]

Originally Posted by masaegu

It is saying:

1. It is impossible to have all 13 killers appear in only 3 episodes.
2. So the creators made changes to have the 13 killers also appear in other episodes.
3. And they even created new original heroes so that the 13 can appear to fight them.

ありがとうございました、 Masaegu先生。
Muito obrigado, amigo.