Arch, true, I was in a rush. I'll make the edits but yes, Gren first dropped Kuhaku off at the dorms, went back to the infirmary to get the equipment while noticing Sapphire was gone, came back to hook up Kuhaku, and than went to look for Sapphire. I was also under the assumption that she never turned off her semblance, as I also remembered you mentioning somewhere that Abel would be in for a surprise when he would go visit Sapphire and not find her there. That would imply that none of them would find her at the dorms until the next day, when either she reveals herself or for the others to discover she's gone missing.