Zhou said:
Cherry is maybe a bit overpowered.
I think so too. Sure, his organs may age fast, but that doesn't mean, he should have an endless powersupply, till they die.
His master broke at dodging bullets, already. Even assuming Sakurai is a genius on this and his powers are evolving at the moment, he should hit his limit soon.
Just let Nishii handle the rest, Oku!
Oh and I don't think Tonkotsu and his master were illusion's. The way they talked to him, they seemed to be the real ones. He had no doubts in his rampage. Imagining them, they wouldn't want him to stop.
My guess is, that he can now "summon" dead people (or at least could do it this once), because of his extremely evolved powers.