HELLO ANON>.<!!!! and ugh where do i even get started.
i think one of my yukamitsus biggest and most beloved headcanons is that mitsuru and yukari exchange clothes and mitsuru feels free to show more skin when she's around. and i don't mean showing skin in a sexual way or anything like that but since mitsuru most of the time she wears clothes that almost entirely cover her up and dresses in a more formal way if you will?
i feel like she would care less about keeping that image next to yukari. suru would wear dress more casually (wearing tank tops, shorts, big t-shirts, etc) next to yukari and yukari makes her feel safe to be like that yk?
everytime i think of this i think of the fucking scene where yukari tells mitsuru to take a bath together and that's theres nothing to hide anymore between eachother.
i hope im making sense here bc it's hard for me to word this but things like doing eachothers nails and makeup, brushing eachothers hairs or just trying clothes together. just imagining them sharing those small yet intimate moments together makes my brain shortcircuit and got me giggling like a middle schooler UGH I LOVE THEM SO MUCH

also a little bonus is that when yukari's talking to mitsuru, mitsuru lowers her head a little bit and gets closer to her so she can listen carefully as yukari just keeps on talking and talking. and yukari blushing a little when she does that bc she's like "oh my god she's actually paying attention." OUGASHDAASUIDHOD THEYRE GONNA BE MY END!!!!!1!!!1!!!!11!!!!