Skyfire and Two-Spear has changed eye color (and hair too) a lot. First drawn image of Skyfire showed her as blond, then her hair was more like Nightfall's. After that Wendy drew it as pale red. Then when non Wendy artist drew her, she showed up as dark red hair. On eyes, Wendy drew Skyfire with pale blue, while non-Wendy gave her dark blue, and then green. Two-Spear had brown eyes, then brown eyes on yellow back and at last he ended up with green eyes on red back.
Not blaming Wendy for eye color changes, it is just a detail which I've noticed after making Two-Spear and Skyfire as dolls.