Board Thread:News and Announcements/@comment-4698889-20180724122634/@comment-4698889-20180925082824

If you're basing it on pitch, that's not a reasonable assumption. As suggested before, it's best to just say "the souls of the Third Period" and list those in mothy's screenshot in the Appearances.

Also, Bruno is listed as "Sigurd Zero" in the Heavenly album, so I think he's always had the last name of Zero.