Hi. I don't know you or your characters so these questions/this feedback is based purely on the application itself.
I have some questions about the backstory of Mikha, because it's honestly a bit short and confused me a bit. Let's go and start chronologically:
You write that Mikha's "childhood was split between the teachings of her village and those of her Hadiist education, which she was never particularly apt. at".
Why is that so? Following the First Revolution, sparked by most of the population being extremely dissatisfied with the monarchs the population rose up - Trizar and its surrounding areas especially were points of origins of the Revolution. They actively coup'd and began fighting. At the end, most if not all rebel groups actively joined the Hadii dynasty, which formed the PRA.
Thus, her parents were probably followers of Hadii, since they were liberated by/with them from their monarch oppression. This means Mikha should be following hadiist teachins, since she never knew anything else, unless there was another reason not to you didn't provide.
"[S]he would be [...] praised by her traditionalist family".
Why would they? Were the opposed to the First Revolution? They would have had an extremely hard time to be pro-monarchist, considering where they lived.
"[H]er life turned harsh as the area became embroiled in the war."
Could you tell a bit more on how it became harsh? Harsh due to the DPRA or the PRA? How did it actually affect her? Did relatives die, was the village destroyed? Given, Mikha was only ~5-6 years old when the war started, yet children can be very affected by war, especially mentally. You write a tiny bit on how life became unsustainable in the village because they aligned with the Almarist forces (Mikha and her family, too?) but it leaves pretty much everything open.
The entire next paragraph is a bit confusing because you dont give any hint of a timeline - Mikha was born in 2444, the war started in 2449, at which point they were still around Trizar. "Later" life there became unsustainable and they moved away to Mezuma. When did this happen? I ask this because in 2458 Trizar was already in firm hand of the PRA, so I must assume they moved way beforehand. So maybe in like, 2452-54? Mikha is ~10 at this time but she was already working in a mine, near Mezuma. Why? And if she really worked ten years old in a mine, how did it affect her?
You also mention that she "found herself slowly acclimating to the difficult reality of urban life during the war". Why is that? Mezuma was never directly besieged or changed hands, it was/is no major industrial hub and all in all (as far as lore gives) was probably never much fought for. What made her life difficult there?
In the next paragraph you write "[...]among other things, arranging marriages with acquainted families. Rhan’mirri was included in these but refused hers. As a result, she was exiled from her clan [...]".
I find this a bit strange, because arranged marriages basically ceased to exist, following the First Revolution (so around 15+ years before Mikha was born). This was a universal development and thus I find it strange that she would be exiled for refusing an arranged marriage like 30 years after they were a thing.
She left Adhomai via Ha'rron - making her an illegal immigrant in Tau Ceti. How did she manage to pull this off? Did it affect her, when she arrived? How did she find a job in a megacorp as an illegal immigrant?
You don't say anything about her faith - what religion does she follow? Why? Did it help her through hard times, etc.
These were some things that I noticed after reading through your backstory once. I'll read it again tomorrow to see if I missed something. Looking forward to hear from you.