The fact giyu never smile and I want to know his backstory

[Theron_]

There is a bonus manga you can read that tells you a little about his past also it has Rengouku and talks a little bit about Rengouku and mitsuris relationship


(Demon slayer tales of water and fire hashira)
Hope this was helpful

[herecomesjeffy]

sabito died, makimo died, his sister died, and all the hashira he new besides sanmei died and him and sanmei got beef