Question about Orokin appearance

Sorry if this was already posted, but scrolling through this subreddit kept giving me Act 4 spoilers.

For reference, I’m currently at the New War quest and going after the Archons.

Why do some Orokin look different from others? Like I thought the Entrati family and Ballas were what all Orokin looked like, but I just realised that the Zimaran was an Orokin ship, so why does the operator, and the other kids on the ship, look like normal humans? If they’re also Orokin, shouldn’t they also have the blue skin, the solid coloured eyes, and long limbs?

Or are there different types of Orokin? Or are the Zimaran colonists just earlier version of Orokin from before Ballas?