These are originally Crunchyroll’s subs, but modified. The video is from Amazon Prime Video Japan because it has better quality, plus the lyrics at the bottom of the songs are not present in the Crunchyroll version. All localized spell names have been changed back to their original Japanese names. Opening and Ending themes have been translated from Crunchyroll on episode 2, and have added them into episode 1. Chapter point for halfway point has been fixed. All character names and places have not been changed. i have the Dai perfect guide book, plus have looked on the official Japanese website for character spellings. Although, the production team has changed some of the name spellings in the 2020 version, but they're still official. Derolin (1991 TV) > Deroline (2020 TV) Zurbon (1991 TV) > Zulbon (2020 TV) Hero Hero (1991 TV) > Heroh Heroh (2020 TV)