"Akaza!"
Akaza knew that voice, and in that instant, he knew he had and was royally screwed. Sweat rolled down his forehead, neck, and chin. That was his mother's voice, and that is how Akaza knew he fucked up. You may not have been his biological mother, but you reminded him what it meant to be human, and how much he needed your motherly affection.
And you just happen to catch a demon slayer's eye while saving him.
Or
Rengoku falls in love with Akaza's mom and you return the sentiment
THIS IS A RENGOKU X Demon! READER FIC
With Akaza&Reader- which means platonic relationship
eff canon I do what I want
Also Rengoku lives, and no major character death. Manga spoilers/further than the anime spoilers
Top Rankings
#1 in Rengoku
#1 in Uzui Tengen
#1 in Rengoku Kyojuro
#1 in Demon Reader
#1 in Muzan Kibutsuji
#1 in Tanjiro Kamado
#1 in Flame Hashira
#5 in X reader
(And because I'm really proud of this)
#13 in Fanfiction (FANFICTION YA'LL)