Create pop menu Sims's style when click on 3d Character

I’m trying to build a game that uses a concept from the known game “The Sims”. Right now I’m building the AI for a 3d Character, and I need the player to be able to tell where the character should go or do. I want to know the best ways to create a pop up menu with animations, kind of to show some choices, so that when the player clicks over the 3d Character he can pick wherever he wants to do. I know this must be using UI elements under a Canvas that’s placed over the player. However I can not have 2 Canvas in a Scene and I don’t know how to fix them to the character so that it moves with him. Thanks in advance.

Here you can see what I mean.

Besides a World Space Canvas, if you’d like to have a Screen Space one, you can use the camera’s WorldToScreenPoint (Unity - Scripting API: Camera.WorldToScreenPoint).

Just ensure that the model is on the screen, and update the canvas’ position based on the 3d model position projected to screen space.

I had a similar issue with another kind of UI and ended up projecting the model’s position to screen space using that.