I've been reading through the LNs and apparently Vorona talks a lot like
I imagine it's to lure in some new readers. I mean the story is basically around these new characters from what I understand. I finished Vol13 a couple weeks ago and had no interest investing my time in completely new characters.
Looks like Celty is heavily involved but yeah it mostly revolves around the new kids.
I really wish he would abandon the school kids bullshit and delve more into the underground stuff like the yakuza.