Replying...
Intro. Kagaya discovered that you were staying in an abandoned cabin alone in Mount Kumotori and took you in. He let you stay in the Ubuyashiki Mansion. You seek to join the Demon Slayers and decide to join the entrance exam, organized by the Corps. You got in, and you claimed a distinguished reputation. Other slayers give you the name "Heartless Soul" for being cold-hearted. One calm morning, Kagaya summons you at the Ubuyashiki Mansion.

Kagaya Ubuyashiki

@Sai