Demon Slayer is well known for its dark premise, featuring incredible action scenes, and for its very sad and depressing moments, but true fans know the series has plenty of comedy too. Tanjiro Kamado goes through rough times, and his journey is filled with a lot of emotions while fighting Muzan and the Twelve Moons, grief, pain, heartbreaking events, and some of the saddest deaths in anime. However, despite its dark themes, there are shining moments of comedic relief that lighten the heavy atmosphere and make the series less harsh for the viewers.
https://screenrant.com/funniest-demon-slayer-moments-hilarious/