Varric has told her everything he knows about the red lyrium. She knows how dangerous it is, she knows what happened to Bartrand and Meredith and she knows that Varric is scared to death of it. She still decides to a) tell someone else the location of the Thaig and b ) doesn't warn Varric or clear it with him at all, in fact she's perfectly fine with letting him feel the guilt of every death caused by the red lyrium. She doesn't take responsibility for her actions, she doesn't care that she betrayed Varric's trust and she doesn't care that he's been so depressed by it. Best. Girlfriend. Ever!
Edited because somehow half my post disappeared, strange.
Varric also tells the location of the Thaig to people he thinks can help, just like Bianca does. She hadn't even heard from Varric since before the Chantry explosion, so she doesn't know what happened. For all she knew, the Red Lyrium was involved in his silence so that's yet another reason to figure it out to help him, since she says all of this was to help Varric, especially if Bartrand is alive and Varric kept the shard.
I just replayed the quest this morning, and where are you getting that she didn't care that she betrayed Varric's trust or feels bad about what's happened. When the truth is revealed, she sounds pretty upset at what she has done. She just says she decided she's going to do something about it over moping about her mistakes.
I'm forced (forced I tell ya!) to agree. The way he trusts his friends... I think she'd have to do a whole lot worse for him to lose his trust in Bianca. I wonder if trust was her problem here too - how good a tale was she told by Corfieoops's meat puppet to overcome what we can only assume were Varric's very in-depth stories of disaster, madness and general badness associated with the Red Stuff? I think that just how she was convinced to accept that "help" despite all of Varric's warnings will sadly remain a mystery.
She tells us why: She goes to the Wardens for help after discovering Red Lyurium is Lyrium that has the Blight. She runs into Larius/Janeka who shows they are a Warden Mage so she thinks she succeeded since a Warden Mage is someone who is an expert on the Blight and magic. Who better to help her?
Plus Varric isn't one to trust friends: He didn't trust the Inquisitor who he treats like a friend about Hawke, his friend who he knows would want to help, until after getting to Skyhold.
Yes it is. A crisis scene is the one(s) you get for low approval. They don't all involve leaving or punching.
By the way, I've just remembered I haven't seen an Iron Bull crisis scene. So it's possible Vivienne doesn't leave and Bull might not even get a crisis?
I think of a crisis scene as a scene that triggers a crisis, for example a character crisis scene is where if you say or do the wrong thing the character will either leave you or die. For example Sera has a crisis scene.