You think too much...lol
Like Aya and the guardian cat girl, players cannot destroy any enemies.
The guardian cat girl will even be there to chat with you after you defeat her.
The only thing the player can do is drive mobs away.
(They will then return and continue to ambush the player.)
The player must chase away mobs because they are getting in the way of the player's work.
It is also inevitable that the monster girl will hinder the player.
Because the player's job is to remove the source of contamination.
(And the monster girls were corrupted by the source of pollution)
There are many different ways to interact in the game, but the "pure version" is just the side-scrolling part.
Released as a free sample.
If you want to experience more content, you can find them on my patreon.