Okay, this may not be the right tree, but these item evolutions are so cool, they may just make up for it!! They thank the old lady (and Hijikata, being a cop, offers assistance from Nightwake should she or her housemates ever need it), then they do take the cloud elevator down.

In the waiting room, they'll have plenty of time to gush and theorise about their new treasure before (hopefully) being reunited with the other groups.