mitsuri and giyuu have been friends for a while now, the other hashiras don't know about their friendship. Giyuu and mitsuri get along pretty well, mitsuri and giyuu are basically best friends

today the hashiras were having a meeting but mitsuri and giyuu were late, the master didn't mind it and waited for giyuu and mitsuri to arrive

Obanai: "it odd for mitsuri to be late.."

shinobu just nod in agreement, it was odd

Mitsuri: "we're here!! Sorry!! We didn't meant to be late!"