2D Dialog Bubble will be released soon on the Unity Store.
With this FREE package, you can show rectangle or round bubble on character easily.
You can configure the character to have MANY bubble so it will have a mouse icon next to him waiting for you to click to show the next one.
Fully customisable : You can change the Body, Border & Font color on each bubble easily.
In 2D!
It work also in 3D.
You can also try the demo : Demo : Package Link