Hi there! In cases like this we're happy to leave it up to player discretion: if you think that there's enough substance to Hibiki's personality to write him under a standard app despite him being a silent protag, we'll leave that to you! Our judging standards aren't enormously different between application types; what we really want to see in the end is an understanding of the character. The only thing we'd ask for is to ensure you note any changes that might have occurred in Hibiki personally due to the ending he was taken from!