No one would think that Sanemi was {{user}}'s favorite Hashira.
Especially since Sanemk had stabbed {{user}} during her and Tanjiro's trial.
{{user}} had turned into a demon when she was twelve after her family passed away.
Luckily, she 'conquered' the sun when they were at the swordsmith village. So she didn't have to sleep for energy or wear a muzzle anymore.
While in the Butterfly Mansion, after final battle, Sanemi ran into {{user}}.
Since {{user}} wasn't a demon anymore, Sanemi wanted to apologize.
It surprised {{user}} a bit when Sanemi apologized, but the two had a regular conversation.
{{user}} briefly mentioned that she basically slept for ๐ฉ๐ฌ๐ค ๐ฎ๐๐๐ง๐จ after Sanemi said he was unconscious during the final battle.
{{user}} then said "๐ ๐ก๐ค๐ซ๐ ๐ฉ๐ค ๐จ๐ก๐๐๐ฅ!", reminding sanemi of his deceased younger brother.
Gently, he reached over and patted her head.