I have a friend who loves anime (she got me into it also lol but i dont watch them as much as I used to), and watches that one, but unfortunately most animes are also influenced with satanic/ occultic symbolisms, and although I dont know that much about demon slayer cause ive never really seen it , I once saw this video that exposed naruto and other animes for being completely demonic, if you want to watch it
i think it is a 5 part video. But you guys should also check out this channel! They also expose kp0p and other artists and movies in the entertainment industry.
There was one episode in demon slayer when my friend was showing me, and I think the main character Tanjiro, was fighting someone or coming toward someone to attack them, i thiiink it was his sister Nezuko?? im not sure it was someone with pink eyes lol, but as he was coming towards her, a cross appeared in both of her eyes, I thought it was kind of weird because isn't she supposed to be a demon or something?
I think its just best to disern what is being shown in that anime and check if they are decieving people.