Author doesn't have say, Ufotable just does whatever, that's the case with most anime

@@natalimoina from what i understand the author is on ufotable payroll as an advisor of sorts

Usually the author added a bunch of stuff to the anime. Most of the times they dont think of it or it just comes to them later after many years that they wanted to add stuff so this is a way for em to add extra content that they didnt get to add int he manga run

@@BulbisaurousRex No they don't advise anything, just let ufotable do whatever they want to, most authors don't get involved with the anime, it's very rare, and it hasn't happened in this case. The author of Demon Slayer hasn't really gotten involved in any professional work manga or anime related in quite a long time now.

@@natalimoina do you have any sources for this information? Just would like to read about it if possible

We do! This last one just didn’t seem too crazy lol