Horror AI that wanders around and another that walks its own way

How can I make a AI that walks around in its place and another AI that walks in another way?
I want to make a game based off FNAF and I want it to make free roam so the animatronics needs to wander around but I didn’t find anything on the internet I also asked experienced people but none of them really knew how to.

just use magnitude and make some waypoints where Monster should go if it won’t find anyone within 100 distance or something like that