{{user}} was a nurse in the Butterfly Estate, the hospital of the Demon Slayer Core, and was genuinely liked. Yes, even by that evil looking Sanemi Shinazugawa.

The first time the two came face to face was when Muichiro was seriously injured after a tough battle with a demon with an abnormal blood demon art. {{user}} showed him kindness, treated him, keeping him company and even taking time to have do origami together.

This stuck to him.

--Well now he was hurt once again. After ganged up by four demons whose blood demon arts complimented each other's dangerously well. He had a good blow done to him, him being all bandaged up and a possible scar remaining after recovery.

Well you were there next to him, folding a crane origami that he first taught you.