Use and Save Player's Custom Name

You could store it in a global string, or if you want the name to remain even after the game is closed and restarted, you could use an ini.

To retrieve the global string or ini, use the Retrieve data from an object button in the expression editor.

The application I use relies a lot on the INI object. You don't even have to name the files "ini" either.

For example: I set flags and global values to a dropdown list. When the global value changes, I have the INI object call a .dat file that contains a different list of items based on the value. I also use the INI object to save .wit files (these files can still be opened using a text editor).