It would definitely have to depend on the color combo used on the Emperor I think. The dichro eyes may look incredible on one, but not so great on another.
I think you should definitely experiment with them though Nam! Like maybe request a set be sent to you for this next Emperor you’re working on, and see how they look with the finished paint job. If you’re gonna do a purplish or wine color scheme… I think the dichro eyes would look gorgeous. But, that’s just from what I’m imagining it will look like! 🙂