Creator of High School DxD explains why he changed the design of the characters & why the light Novels aren't Coming to America.
Sources
Creator speaks on characters's new looks: https://comicbook.com/anime/2019/09/07/high-school-dxd-hero-new-character-designs-explained/
Creator Speaks about the Light Novels: https://comicbook.com/anime/amp/2019/09/10/high-school-dxd-light-novel-english-translation-release-comments/
