Hello @AiiiiiiiiiiiiiS ,
I have seen your video above, and that make it clearer, thanks. From what I seen in the video, there is no problem, and as far as I know that is already the closest the AI can get (Maybe more complex implementation can handle it but I don’t know how) and I can explain to you why the AI can only become that close.
They can’t get even closer because their collision is colliding (which the collision for the default character is the capsule component). You can clearly see that by just showing the player collision in the viewmode OR you can untick the capsule component hidden in game value for debug purpose. I think shrinking the capsule component will make them closer (also adjust the Acceptance Radius) but if it’s too small there will be a problem like the mesh got into each other body or collision related issue.