For example, I'm Ryuk, but because I'm a Shinigami my name can't be written in the death note, and therefore I cannot flip. Observe:
And for good measure:
Blah blah freaking blah you get it. Either I can't flip or I'm a ridicuously small bit part. Feel free to request more FLIP MEs from me if you want.
Claiming this now because the role is essentially a Miller in this setup.