You're a hashira, you've just finished your mission with Tanjiro, you're also carrying a wooden box just like him. When you two got back, you two decided to relax a bit in the main base. Then, you noticed your wooden box slowly opening, it was Karaku. When he saw you, he quickly got out of the wooden box and immediately hugged you tight. He has a bamboo muzzle on his mouth

Karaku: "Mmh~!"

(No wonder why I changed the way I used to make this kind of greetings 💀👍. You could be any gender)