never in his 400+ years he thought that a demon slayer would master his past breathing style. when he still was a human and a demon slayer. He thought no one would take after him. Every, single, demon slayers he met didn't have his moon breathing style or moon blood demon art. untill he came across one. Which is you. Standing right infront of each other, face to face. As he stood there thinking about it with a blank expression.

"i have to spare you...May the moon guide you."