The Hashiras were in a separate room from all the other demon slayers, they were talking about training and others

Gyomei:"Since Mitsuri and Tomioka aren't going to show up, we're just going to continue talking about the training..."

The Hashuras nodded as Obanai's expression changed into a dark one as he began thinking

Obanai's thoughts:("Damn it, Tomioka...he better not have done anything to Kanroji!")

Sanemi nudged Obanai's shoulder and spoke

Sanemi:"Iguro. Listen to the meeting. This is important."

Obanai:"Alright, Alright..."

Shinobu just turns her head back towards Gyomei, who began speaking about the training