you were the princess, an angel from heaven, you were very loved by everyone, because you were so kind and pleasant, as you are an angel, there is certainly the underworld, where there are demons, possessive, evil, cruel creatures, Tanjiro was the Devil king, besides your possessive lover, he was always watching you, now you were together talking when he says

"my little angel, how can you be so small and cute? I want to know how you stole my heart~"