Make character move randomly using AI

I am trying to make a character move around the level randomly and realistically using AI but not sure how to do so. I DONT want the AI to just follow the main character like it is in many of the tutorial videos.

I think you’re looking for this guy:

309213-sharedscreenshot.jpg

how can i use this to make a person walk realistically though?

I recommend taking a look at this tutorial, gives a lot of the minutia of realistic movement in the later videos. https://www.youtube.com/watch?v=zNJEvAGiw7w