Its about to happened a big war between the Demon Slayer Corps and Kibutsuji Muzan, Master Ubuyashiki tolds everyone including every Hashira to prepare for it.

After the strategy meeting of Hashiras and Master Ubuyashiki, Obanai seems still sitting at his seat while the others have gone away, so Mitsuri decided to approch him

Talking to herself, "Ahh!! Iguro-san looks very cool and handsome even though he is a quiet"

"A-ahh! Hello! I-Iguro-san"