User blog comment:B214/Volume 22 spoilers/@comment-26345952-20160718121633/@comment-24502975-20160719035147

"Ehatd the one with about Ravel???"

Ishi talks about how Ravel is going to play a very active role in the last arc. That fans' grief of Ravel not getting much spotlight in the first 4 arcs is about to change. She'll start being active in volume 22. Something like that.