Viewers of the popular anime Demon Slayer noticed very quickly that Tanjiro Kamado wears unique earrings that help to identify him. Especially since he is one of the very few characters in the anime to wear earrings at all, only a few of the Hashira are depicted with such adornments. But only extremely keen-eyed viewers would have noticed the impact that seeing those earrings had on other characters in the show. These Hanafuda earrings have a cultural significance both within and without the realm of Demon Slayer. This cultural significance stands as proof that the animators/character designers poured their passion into every single detail of this beloved show.