Dayum now things are getting dark, I guess Paisley Park has actual physical properties... IT'S EVEN MORE OP!!!
Tomoki's abilities to willingly turn into rocky grains explain his control over a lot of things and Yasuho will probably have the upper hand by teaming up with Mitsuba and using her knowledge about the Rock beings that was hinted at (finally bringing back that hairpin).
Also only now I realize some of the visual motifs between the users and their stands, like the obvious arrows from Mitsuba and her rad-looking stand and the fact that Yasuho has a map on her shoes. But if was pretty clear that Mitsuba would be a stand user, beacause of the whole Wall-Eyes bite-marks thing.
I imagine that through him the protagonist will finally get the idea of what the rock humans plan an who's behind it all.