I don't think so. Pretty sure you can just enter the name right away - however I think it's buggy, because the final animations assume a certain amount of transformation.
Please forgive me if that's not correct, I made this game about 5 years ago.
its fine, i havent played it in a while but last time i had either a 3 or 4 letter name but couldnt enter it early. all i remember is i guessed right after the first letter i found and the name was super short. low chance of that happening with other names, at least for me, so it may not be an issue worth looking into.
ty for answering.