Species:
Humans:
I am referring to the main species of humanoid as humans. I'm not completely sold on the idea that they are human, the ending of PS2 suggested that they were never from Earth. I may explore this idea in future fiction, but until then I will refer to them as human.
The Palmans, in my view, were much more xenophobic than fellow humans on Motavia. I believe that they would have resisted making human/biomonster hybrids that were first introduced in PS2 and later labeled as Newmen in PSO. Unless there are rogue scientists or downloaded programs within their ships' systems, I don't see them making an appearance in an enclosed environment like a colony ship (obviously at least a couple of those ships were more 'open' about it – Newmen made significant portion of the PSO colony ship, the Layans in the PS3 colony ship used monsters in their armies and would likely have accepted hybrids as equals).
Androids:
The artificial sentient lifeforms that have made appearances in PS3, PS4, and PSO will also make an appearance on the colony ships. As I stated earlier, the Palmans would likely resist association with the Newmen, but might be more accepting of a creature that was man-made. Androids are something they invented, they may even treat them as equals.
It is almost certain that androids were in production, or at least designs had been in existence since PS2. Robots would've been used very often on all three planets, and Mother Brain was a complex A.I. If not for PS4 I would assume that android production only started with the colony ships, but the 'Wren' design appeared on both a colony ship in PS3 and Mota in PS4 – too similar to be separate projects. At some point the breakthrough in android design took place in Algo, copies of these designs also left with the colony ships.
They are humanoid in design but vary in their external appearance – from artificial skin to metallic 'armor' appearance.