He likes that look! If he thought he could get away with hair dye he'd probably give it a go, at least until he found out what it means when a plant's hair starts turning black. But it's definitely noticeable, and makes him look just like the guy on the wanted posters; Vash gets away with it by virtue of looking like he's fifteen or so, not in his twenties. And it's going to be some years yet before that changes.

Hand set on his hip, he considers the hair, the diatoms, and the lack of a handkerchief, weighing options. "Maybe it'd be enough if it just isn't sticking up," says the kid who's hair would definitely be sticking up in exactly the same way if he were cleaner, "And don't put this on me, it's not my fault I don't want you to get shot up." Well, it is, since he's the one wanting it, but that would be too sensible. "I know a place you can keep the coat, but we'll probably have to stay out of the suns if you burn easy." HE burns, presumably every plant can burn, and this one's wearing stuff nearly head to toe so maybe he has sensitive skin.

The worm would have been easier to eat. "...You can have the donuts anyway if you want them. I won't be eating them." Maybe in a few weeks he'll give another one a cautious try, but the idea alone of trying again made his stomach roil.