My normal advice for someone with a minor character POV would be to not create too much emotional connection to the character, since they are usually there just to fill in a couple of critical elements (like the political officer at the beginning of On Basilisk Station). You get the perspective of a bad guy, or momentarily see the horror inflicted on the civilians. It's not my favorite thing, but occasionally it's needed.
There is also a strong line of advice that says "Get rid of anything not central to your story." Simplifying the story and eliminating a distracting subplot will keep the story clean and smoothly flowing. It's an option.
But in reading your description of this character, I'd have to say the opposite is true.
This character isn't there to influence events, or be a pivot for the plot. They exist solely to add soul. You are humanizing the dramatic events because sometimes epic events are lost in the consuming importance of them to the people who are doing the big things. Think WW2. A general of either side is influencing the events, and we have a natural bias based on history. But humanize the events by making part of it about a single soldier, or a sole civilian (of either side) just trying to make it through, and a reader can connect with them.
Dwight D Eisenhower is my grandfather's second cousin, so I kind of connect with him. My uncle's name was Dwight, and Eisenhower babysat for my grandpa. I've seen his presidential library (Abilene KS), and even toured the command train he used in the war (Green Bay, WI). I suspect that I could personify him pretty well. But do your readers really viscerally connect with him, even when you make him a personal character?
So my advice is this: Either play up all the humanizing traits of this "lesser" character, or else ruthlessly annihilate them from your story and keep the plot clean. I personally like the idea of adding a real character to your character, since people like people they understand. This character's stakes are likely to be as important to a reader as whether or not the Alliance conquers the system or the Pact worlds find a way to foil their plans.
But you can personify the other characters, making one an alcoholic, or having them hiding and enemy prisoner they're related to, or WHATEVER. They could project a heroic façade while secretly being terrified they're a sham, or wondering if they're fighting for the wrong cause. You can always take all the parts out of the novel relating to this one character and make a short story or novella out of it (especially if your novel is published). Who knows? Maybe you DON'T get the novel published, but can get the short story out there. Then your novel has a published work it's "based" on. I've heard of crazier things happening in publishing.