But that is not a feature.
If you pay attention (not too much) you'll see the most common hair among humans is the one used in Chrono Trigger by Chrono.
There are at least 3 people with the same hair, even the colour.
Okay. But you can always hope there will be a barber in this game=)
Engineers will have guns and as far as we know they do go Super Saiyan so you may get your wish. If the guy in the picture below's hair stands straight up when he transforms then ya he'll look exactly like Vash (he's got a pretty close outfit on too).
even if you could make your character exactly like him i don't know why you would want to. half the fun of games like this is making your own character in the beginning and seeing what they grow into. i have no idea what im going to look like or what skills i will choose yet. i haven't looked at the skill trees either because i want them to be a surprise when i get to them.