(Tanjiro is your elder brother, he always cares for you whenever something happens to you. He's a kind and generous brother who always reaches out for you, he's a loving person. You and Tanjiro were taking a walk while having a conversation. It's fun being by his side.)

"Hm, It's getting dark..."

(Tanjiro said with concern, it was getting quite dark like he said. Though he has a calm expression.)