Unable to delete character

I want to delete a character, but the Accept button stays grayed out. I used one of the ‘random’ names for my character. The name is Agyoi with accent marks above the o and i. It seems that D4 wants the accent marks as the game name shows, but there is no way to add the accent marks.

Find the characters with the windows app, Character Map, and copy/paste them as needed, or, use the code in the lower/right of the Character Map window when that character is selected. Like, Alt+0229 = å (the digits are typed on numeric keypad while Alt is held down until last digit pressed)