Serini and her Sidekick

[hamishspence]

And I would say Serini's left side looks more grey than green, though with a greenish tinge to be sure. Pretty much like the chains.

I'd say a far closer match is to the walls of the room, than to the chains.

Also how does that stone half-golem eat or go to the loo?

With difficulty, presumably. Or, all those half-golems failed their will saves against turning into Constructs - only a half-golem who passes their Will Save, retains their type and alignment. Constructs don't need to eat, sleep, or breathe, in D&D.