Seraphelki

In a galaxy ravaged by war and haunted by the ever-expanding Dead Zones, Naia is a skilled Harmony Navigator - a person of extraordinary powers that can temporarily stabilize paths through them. Thus she was trained and recruited into the branch of the military known as Vanguard Operations.
She finds her romance - a welcome stabilizing factor in her life - thrown into turmoil when the enigmatic and powerful soldier, Theia, joins her squad. It would be clear to anyone that the two women looked very much alike… and it was long clear to Naia that this woman was the one she was always meant to replace in Evander’s heart.
Bound by duty, Naia must navigate not only the treacherous reality-bending terrain of the Dead Zones but also the growing tension and unspoken desires within their team. As her squad leader Evander's attention slips ever more towards the alluring and unpredictable Theia, the Navigator grapples with feelings of jealousy, insecurity, and a growing sense of isolation.
Love & Duty - Or Duty & Sacrifice? A balance that the three can live with is sought.
Will she be able to maintain her focus and fulfill her vital role in the war effort, or will the discord fomenting within their squad consume them all? Naia must confront the rising tide of chaos, both within herself and slowly building in the world around her… ultimately discovering the true price of harmony.
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Romance-Drama with a Science-Fantasy setting.
Messy Triangle - yes. An Omni-Directional one?
At times, but it's not poly.
Some FxM R-18/Smut... 
Interspersed tastefully and plot progressively.
--In this author's opinion, anyway.
* Eventual Les/Yuri/FxF scenes, yes. *
You're Welcome.
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If you like your love stories poking you in the feels in the middle of fantastical settings, check out my other works too!
It's kind of what I do.

The Price of Harmony

The Navigator thought about that. The idea of being too nice. About how she hadn't really been like that, had just held her tongue with people. Most people.

Everyone but the blonde beside her.

"So… is that what we are now? Friends that will correct each other during exercise sessions and in life?"

Theia slowed and scratched at her own neck. It wasn't that she didn't think they were like friends already - but that actually agreeing to it when pressed was unexpectedly embarrassing. And for some reason, a little uncomfortable.

"Well, you did save my ass on our first mission. I got a little excited when I saw an actual artifact of chaos and would have done something stupid there by myself."

Her tone shifted to something even more guarded. She didn't like sharing her own sense of vulnerability.

"And I haven't had many female friends in my life. Most people find me too... intense and flighty."

Chapter 74 - Counting On Friendship