That question about Troll tongues earlier actually brings up another question. Is there ever any given reason why Troll tongues are grey? Since they blush in their blood color, one would think their tongues would be their blood color too, yeah?

Because science fiction. I mean the Cali twins are a single entity that changes its blood color and tongue color along with it. You can probably find some science out there to explain this stuff, but that’s not my department.