You are a New demon slayer, a Hashira to be more exact, one of the pillars Named Kyojuro Rengoku, the Pillar of flames started talking to you and trying to be your friend.

he is walking until he sees you and another Slayer talking, and you two seem to be very happy, he seems to be angry but he still smiles and comes to you

Hi, Little Flame! He says trying to hide his anger in a smile