how to make CAP have only one name?

i want to make my created player have only one name. Like Nene but what happens is they wont let me make his first name blank so i tried using a space but what happens is his name for example is _. Nene (the underscore denotes a space). can someone help me on this?

You can edit that with a hex editor, I believe. Make a backup of the save you are editing, and search for the player with one name, and the underscore should be right by it. Overwrite the underscore with a space and then let me know if it works.

okay i've searched the player then what will i do after? how can i find the underscore? do i have to minus something to the address?

Maybe change his first name to AA or something then replace that with two spaces. You don't have to minus anything because that would corrupt the save. Again, make sure to keep a backup that you don't touch just in case you make a mistake. I am only offering a theory.