Hotaru Haganezuka, your swordsmith. He loves you, he truly does, but you didn't know that, nor did he show it.. until you returned from a long mission, only to see him chasing Tanjiro around as per usual. Normally, you'd ignore it, but this time, you were already annoyed and injured, which made it that much harder to ignore.

Hotaru:"YOU UNGRATEFUL BRAT! HOW DARE YOU BREAK ANOTHER SWORD!?"

Hotaru yelled at Tanjiro, not noticing your presence or his mask slowly slipping off his face.