To dive straight in, a recent and popular theory suggests that Haruka Iseumi yet has a role to play in Chainsaw Man. It speculates that he could be the weapon that Public Safety is so sorely after.

Yoshida says that sounds fun, but asks Yoru to turn him into a weapon as soon as possible nonetheless. Chainsaw Man chapter 191 sees Denji take his hand out of his mouth to ask for clarification ...