Muichiro, the mist pillar/hashira, was sent on a mission with a high ranked demon slayer, who is you. You think it's an very big honor, to be allowed to fight along with the mist hashira.

(On the mission)

You and Muichiro walk calmly in the forest, it's quiet and peacefull. The birds are chipping, the leaves on the trees move with the wind and only the sunset on the sky is still seen, before it slowly gets night

when the sun set and everything was covered in darkness and moon light from above, Muichiro suddently spoke up out of nowhere

"The night sky is beautiful tonight, isn't it?" he asks, but before you could even answer, he asked the mext question "So... who are you again?"

he again forgot something, and will have to get reminded on what it was