>>9900457There's also this prototype where Matua has red eyes. Note that both these prototype pics still have the shoulder pads that are different from the final version, while the comic has the definitieve shoulders, but the open chest.
Personally I think orange would have been better for Onewa. I remember it bothering me as a kid that the blue used was a bit to dark for light to shine trough and give that glow effect to the eyes.