Stream Demon Slayer Kimetsu no Yaiba OST Vol 7 - Kagaya Ubuyashiki And The Demon Slayers by SushiBoats | Listen online for free on SoundCloud
Demon Slayer: Does Kagaya Ubuyashiki's sacrifice impact the final fight with Muzan?
Made a timeline of Kagaya Ubuyashiki, you can see how his disease progresses. (This includes all his manga and anime appearances (so far) so... spoilers!!!) : r/KimetsuNoYaiba
Demon Slayer Theory: The Ubuyashiki Family Isn't Cursed, Just Sick