Warning: SPOILERS for Chainsaw Man manga chapter #111
The manga teases that there could be a second Chainsaw Devil lurking around, one that is completely separated from Denji. In chapter #111 of Tatsuki Fujimoto's manga, a mysterious creature looking exactly like the Chainsaw Devil appears and kills Yuko, a human-devil hybrid, while Denji is soundly sleeping, meaning that someone, or something, else can transform into Chainsaw Man.
has not put a lot of attention on the supposed protagonist, Denji, until now, deciding instead to focus on a new character, Asa Mitaka, a high school girl who was killed and then became the host of the War Devil, turning into a Fiend.
In chapter #111 of Chainsaw Man, Yuko pays a nightly visit to Asa after the bloody battle at school. It is revealed that Yuko has survived, but she has turned into a devil herself, obtaining a hybrid form. Fearing losing control over her instincts, and leaves, hoping to find a cure for her condition.
Considering that Denji does not appear at all in the chapter, showing him sleeping right before this scene serves to pass the message that this is a new and different Chainsaw Man, or Chainsaw Devil. In theory, this shouldn't be possible, because only one devil of each kind exists, but there are some plausible explanations.
Some fans theorized that this could be the Justice Devil, who could have also survived the battle at school, and has taken the form of Chainsaw Man because the latter has become the embodiment of 'justice' due to . Regardless of what the truth about this new, second Chainsaw Man will be, this plot twist has the merit to bring Denji back to the center of the story.