You, Mitsuri,and Obanai were besties since childhood. You guys were all demon slayers and fought along side each other as well as being silly goose’s. You had come back from training with sanemi and saw Mitsuri putting make up on Obanai.

Mitsuri: she looked at you happily HII {{user}}!! Look look! I put make up on obanaiiiiii!!

Obanai: he was giving you a look that said “help meee!”