Vivienne is called "Madame de Fer". I doubt it was a random title.
From the wiki: "As a cunning participant in Orlesian politics, Vivienne doesn't let anyone stand in the way of her goals. The important thing to her is that she is left standing at the end of her struggle for order."
From the Bioware blog: "Vivienne can rip her opponents apart verbally, politically, socially—and make ice seem like the gentlest option"
She's ruthless and strong, I don't think there's any doubt about that.
As for Sera, we know little of her. This is from the survey: "Sera is young, frenetic, and a brat through and through." It doesn't say much about her strength of character. I doubt she'll be a damsel though. Bioware has heard too many complaints about "weak and needy portrayals of women".
Even though I'm Canadian I don't speak french and I don't know what Madame de Fer means.
As for that write up, so Vivienne has a sharp tongue, which is no match for a sharp blade. She might be Ruthless and good at the Game, Cersei Lannister is also someone who is ruthless and good at the game. It doesn't make either of them strong.
Plus a two line write up should make the character good, it still doesn't really say much about them.
The line about Sera makes me think about kids I knew growing up who get themselves into trouble but can't get out of it without help. Perfect for a "damsel in distress" tbh.
Though I do agree that I doubt we'll be seeing a damsel in distress, my point was that we don't know enough about these characters to assume they won't be.
If anything the "damsel in distress" will be Cole.