Is Kenneth a new Person?

Who is that guy there? and have you already had the side mission?

No, he isn’t that new any more.
He is the person behind the apple murder mystery.
Have you seen the many locations with dead people with apples on them?
It was an untold story for a long time. Then, with one update, we got these short side missions to find out more about these murders.

I don’t know if it will continue one day, but at least WE now know who did it.

You could sabotage it or the ritual continues. What else happens after that? because then it was just over for me

Nothing.
If you sabotage it you will be attacked by some machines, if not, you get some rewards by Kenneth.
That’s all until now.