I think that there was a common enemy for three families ZPR, so they formed an alliance to go against it. In the end, the alliance won, but as a result, a retaliation or a revenge plot against them might have been enacted, and Sasha might be a victim of it. That's why she trains martial arts, has a bodyguard and mental trauma. Her scar caused by sexual assault in the past might be plausible given the context that her charm ruined several marriages, but if so, she must be very uncomfortable around men. The game shows none of this, so I assume that is not the case.
Nami may very well be involved with these families. She has one of Leia earring, her parents died in a car accident (which sounds pretty set up), and Katie Zane came to check on her, knowing that she will attend that book club. Now, there isn't much known about Nika; his parents also died in a car accident. He mentioned an uncle taught him how to play basketball, presumably William, that was when he was in Noji's custody, so William may be just checking on Nami, or he could also be involved with the mafia stuff, I don't know. Okay, how does that sound, guys?
Well that was good theory.
For Sasha point, me myself still not quite sure about her. If we talk about her trauma, i'm pretty sure it probably true. And MAYBE she's interested to Nika as "act of pity" because of his condition. Because we know whenever Nika got his condition pop-up, Sasha and friend always seen around (the redhead friend, Robin and even Sasha herself) to help him.
For Nami point, i'm agree, probably Nami is important character for the Zane, whatever the reason it is. OR maybe they interested to Nami because of Nika.
I just take two quotes from the discussion to not bloat the post, so this one is not specifically aimed at those two quoted.
The wild speculations and the sometimes conmplete assinine, broken new background work by Ocean becomes blatantly obvious with each new detail. Ocean could have saved the well-fitting, original backgrounds of both SG and Wiab if he would
have sacrificed some characters from the LI list. In SG it would have been far easier with just Nami and probably Ayua stricken from the list.
In Wiab, he would have had to sacrifice the female members of the Zane family from the LI list. But we players would have lost not much!
Both games have very nice LIs beyond those mentioned. In Wiab Miru, Zoey, Monika, Dana and Daphne to name only the important ones. In SG we have Bella, Nadja, Sasha, Amber, Zara, Vicki to name some.
It actually would have been better for the two games development if Ocean had the balls to do it, making the LI lists smaller, taking off the Zane family members and Nami! He could have kept the original background, making this bollocks rubbish rewrite unnecessary and with less LIs easing off the workload with fewer paths to be made.
Given his workspeed, which makes snails look like race drivers, any lessening of workload would be a net positive. Let´s be real, if he cannot quicken his workspeed by a substantial margin, both WIAB and SG will never be finished or a substantial part of us will be dead by the time these two games are finished.
To be flippant, given Ocean´s "speed", the devs of "X4:Foundations"(a fantastic space sim), who are a small circle of enthusiastic friends, will have finished X4+expansions and be mostly through publishing X5 + expansions, when SG and WIAB will reach 33%. (By the way, X4 is seven years old with 4 expannsions so far)