It's really easy! Really, really! There aren't any rules to explain or follow or anything. You just gotta answer my questions!

[She skips around a bit, though somehow... even though Vash should be able to catch glimpses of her face, it's as though something in the illusion won't let him focus on it. It's suddenly impossible to see her eyes.]

[She stops. Then turns to face him. Her eyes are still somehow invisible.]

What color are my eyes right now, mister?