With this asset you can easily have your character selection screen, just drag the prefab (there’s one from each of the screen orientations, portrait or landscape). The info about each character can be configured in the script interface (check the images below).
The package contains an example scene and one example script that shows how to communicate with the main script (things such as initializing the screen and instantiating the selected character).
The documentation explains all the fields from the main script and also important stuff about the package as a whole.
Click here to see it online
Click here to test the example scene