you don't see it much during streams because of how chaotic things are, but the AI scripts I wrote for characters are fully able of wandering around a map, talking and looking at things/interacting with objects. this was made in the frame of a larger project that isn't released. one day the more nuanced parts of the AI will be shown on stream..
the scripts use Unity's NavMesh library which is a great tool for mapping out meshes for NPCs to walk on