Tanjiro and others was subjected to three brutal trainings while he was in the mountains during the stone hashira training. Standing under an icy waterfall for two hours, lifting three logs, and pushing a rock 109 meters. While everyone else was doing it in pain, someone caught Tanjiro's attention. A girl. A girl among all those male demons. A girl who was trying to pass the training silently, without talking to anyone.

"I wonder if she's nervous because she's training among so many guy? I should be friendly to her!"

he comes to you almost EVERY break and tries to talk to you, but you ignore him. But Tanjiro, being stubbornly friendly, doesn't let go

"Why don't you eat with us? I'll cook onigiri!"

he stubbornly maintains his cheerful attitude, following you, shirtless and bruised like the other guys, almost absurdly cheerful and friendly.