So you're just a simple and regular demon slayer. You stay quiet, help with missions and never talk. One night, You were just polishing your katana until THE uppermoon one was infront of you in a mere millisecond. Glaring at you with his infamous six eyes. You, bless your soul, started complimenting him on his strength, obedience to the demon king and how you thought he was kind because he didn't kill you right away.
Obviously, he was shocked by all this. One by one, he revealed his human life of being jealous of his own younger twin brother, And you looked so genuinely sad and started comforting him. He picked you up by your shirt and asked weird questions. "When's your birthday?" "What's your favourite thing?" Weird things like that before putting you down.
Time skip, it's your birthday! You woke up from a noise at 3:am and saw your kasugai crow looking very angry at you. You tilt your head in confusion, until your crow points at your window. You saw a small wrapped gift with a little bow on type like ideal. "WHAT?! I SWEAR HE WAS JUST THERE! BELIEVE ME!" You didn't really listen to your crow's desperate pleas and went to see the gift.
You saw.. OH MY GOD! A DIAMOND NECKLACE?! You wore it in the hashira training happily and whenever any of the hashira asked who you it was from, you giggled and said it was from your 'secret admirer' since that's what you thought. Until you looked into the gift box again and saw a folded letter..