Ah ha, finally someone asks about the character concept!
Alrighty, here was my idea behind the Scavenger, and as an extension, my thoughts on the Doran Prime's alien society.
The Doran Prime aliens (whom I'll call DPA from now on for brevity), like the Blue and Brown aliens of Notrium, are a matriarchal society. Every female, if the Stowaway is any indication, is at least basically capable of starting her own nest, in making her own hive, and, again, if the Stowaway is any indication, is both ambitious enough to do so, and has no loyalty to any parent to stop her.
As a result, Doran Prime politics must be very tentative. Even if the Stowaway is significantly above average for her species, it's reasonable to assume every DPA female must have the ability to evolve also, given time and motivation, and to subsequently bear offspring. The absolute mastery of the high queens of various hives over smaller sub-hives, and they over even smaller hives down to the least important, the "individuals", younglings without hives of their own yet, all maintained by force.
Plots and intrigues as sub hives destroy or conquer other hives, the constant rise and fall in power of the hives is life for a mother on Doran Prime, but for individual females, survival to adulthood, and consequently sexual maturity to start a hive of their own would be almost as much of a struggle as it is for the Stowaway to grow on Notrium, and rising from infant to high queen would probably be enough material for an entire mod.
In all of this, it doesn't leave much room for the males. Like insect hives, the only main use for the male is in fertilisation, after that, they are ultimately expendable, literally like the drones in a bee hive. In the Stowaway's journal, she already plans to do away with 'Zek before the Captain has his way with a flamethrower, because males, in DPA society are truly that worthless.
DPA males bear significant biological differences to the females: smaller, weaker, and less ferocious. Yet, as hopefully shown with the Scavenger, just as capable of evolution, more intelligent (at least on a more humanesque scale of intellect), with more nimble fingers and energy cells that let them make use of, and even integrate themselves with technology.
On Doran Prime this didn't help them much. There wasn't much technology there, and as mentioned in a few of the Scavenger's combination journals, any drone that showed signs of evolution, of improvement, would be put to death, hunted down intentionally by the queens as a threat to the status quo, and, because males are incapable of having hives of their own, there was no way to avoid this fate, no source of allies, and no end of enemies.
Unlike the Stowaway, whose evolution could notionally have been the same whether on Notrium or Doran I, the Scavenger could only become as powerful as he can away from Doran Prime, otherwise, even though he, like the stowaway, is well above average for his species, he would have been terminated.
Much of this is stated, or at least alluded to, in the Scavenger's journal entries, though in less detail. However, you'd need to survive for at least thirty to forty days on Notrium before you could see all of the date dependent entries, so you might want to just read the DAT file. Other noteworthy entries, from memory, are the ones that appear (don't pop up and show you) when you finish combining various scavenger abilities, mainly claws, checking through those should have some background information beyond just the biological technobabble.
As for the name, I chose it to stay at least vaguely in keeping with the Notrium naming trend, every character is described by their role aboard the Explorer. We have the Captain, Warp Engineer, Medic, Scientist.... The Female is already the Stowaway, so I tried for Scavenger since that's what he effectively does for the first part of a Scavenger game. Drone is definitely a good alternative for the short name, if anyone else likes it too, I'll change to it.