Bio.: Naas'Taara (or simply Naas) has the "Qwib-Qwib" marked as his homeship, but he only trully steeped in the flotila wen he was five years old. His mother, along with other ten pregnant female quarians, were part of a secret project to create Quarian biotics, in hope this would help strengthen the quarian's poor immune systems. Since they could never go trough any official channel for this kind of thing, because of the way they were seen, they had to cut corners. And thus they came to know of the Euryales, a rouge group of Asari, Salarian and Human scientists who performed any kind of experiments "in the name of science", carrying little for ethics and moral. All of the mothers died in the experiments, and only tree children were born. Two went insane as they got older, and they teared the lab apart, killing all of Euryales' scientists in there and almost all of the quarian squad that was sent to help. The survivors of the squad wanted to kill the last boy, in fear him would also go nuts and go on a killing rampage. But their leader, Admiral Zall'Koris vas Qwib Qwib, talked them down.
The boy seemed fine, and the scientis notes showed his mental readings were stable. The scientists also developed a blocker to the biotic abilities that worked like the reverse of the comom biotic amp, so as long as it was installed, the boy would be a completely normal quarian. The boy was taken back to the fleet and was registered as Naas'Taara nar Qwib-Qwib, Admiral Zall'koris son. All the record's about the experiments were sealed by the admiralty board, but by Zall'koris request, the boy remained with his mother's clan name.
As he grew up, he trained and excelled in tight combat situations, and some even compared his fierce skills as with the Krogan (though most krogan would laugh if they heard this). He also believed in his "father's" Ideals, and wanted to reach a peacefull solution for the geth-quarian problem. For everyone, it was almost granted that Naas would became Zall'Koris sucessor in the future, but first he still needed to go trough his pilgrimage, and he would surely need an impressive gift to even be considered up to the task.
But never underestimate the political schemes going on in the flotilla, and as Admiral Zall'Koris point of view never was popular among the quarian population.What better way of demoralizing the "geth apologist" than making his son look like a traitor? So wen Naas was permitted his leave to complete his rite of pilgrimage, Admiral Han'Gerrel vas Neema, Zall'Koris most notable oppositor, sent a spy after him, Sunni'Tera vas Neema, a female infiltrator. She had to keep him from completing his pilgrimage, and gater intel on him, so they could come up with something to incriminate him. They new each other a bit growing up, since they were from diferent ships, but in the rare ocasions they seen each other, they didn't got along really well, because of the extremely different points of view. And her sassy personality annoyed Naas greatly.
Nether of them returned to the flotila, as both got involved in the project Arkon - wich I don't know the details, so I will leave it at that
But Sunni would spend a great portion of the game's story trying to find a way to return, she is very loyal to her people.
In terms of appearance, there isn't much to say, they are quarians after all. Naas suit has a blue/white pattern, and Sunni's is red like blood.
Combat:
Naas: Ruthless, he literally trows himself in close range combat. Shotguns and ominiblades are his weapons of choice. Since his biotic powers are locked because of the biotic blocker, he would unlock his powers in the middle of the story, making for a nice plot twist, maybe almost driving him mad. But from the start, it would be noticeable he is different from other quarians, since he doesn't have a weak immune system, and can heal faster.
Sunni: Fights cloaked, like Kasumi. Sniper rilfes and submachine guns are her weapons of choice. She is also and excellent hacker, and finds disrupting firewals and suits shield defenses exhilarating.
Approval/ Morality
Naas: He mostly approves diplomatic actions, but he also has a bit off a hot headed personality. He will sometimes compel the player to more drastic decisions, but he is not unreasonable. So, his is in the blurry line that separates paragon and renegade, but tends to go more for the first.
Sunni: Renegade. She finds diplomacy boring. She wants to get the job done no matter what. Also, she finds immense pleasure in sabotaging her enemies plans, so if the player goes that road, she would definitely support it. She can, however, depending on the player's persuasion, change her views by the end of the game.
Romance
Naas: At first, he isn't interested nether a female of a male player, but after completing his "biotic reveal" act, and if the player choses to help him, he would grow closer to them. If the player goes further, he would take the initiative and ask if the player is interested, even if he finds it really weird since they aren't from the same race.
Sunni: She would tease the player, and would be completely be in control of the situation. A bit like a dominatrix. But she would only open up for a romance if the player didn't support Naas and authorize her to record her findings on him to present them to the fleet if they ever find a way to come back to the milky way. She would be a romance interest only for a female pc.