NPC name viewer

Hey, guys. Does anybody know how to script a feature like the randomly-generated soldier names in games such as the Call of Duty series? I am making a historical game and want people to know the real names of the NPCs (which represent real-life people). The feature looks something like this:



It would be very helpful if someone could provide some advice on how to recreate this feature. I'd appreciate all the help I can get on this topic. Please and thank you!

 

Use a raycast to see what your mouse / camera is looking at. If it connects with a soldier, display the UI element with their name.