The dialogue is fine, but if you're so triggered by it, you can just turn of their banter.
It's ok if you don't like her at the start, that was very much going to happen seeing how she's a bit of a fuckup, heck the game starts with her showing up in court and sassing a judge. Then she's running away from thugs, and then the home she was squatting in gets destroyed, together with her means to escape her shit life granted that scene could've been handled much better cause she's got two arms and picking up the bag was on the way out....
Since she had to be on her own and fend for herself for so long, it ties into her behaviour when she's transported to the new world, she doesn't care about any of their struggles, since she's grown to be selfish; it's not her fight so she just wants to fuck off back home as fast as possible and why she's also impatient.
Once the ball starts rolling however she starts to change and starts caring about the people since they can't fight/survive like she can. Even the banter with cuff gets better since they grow closer to each other as the story unfolds.
The only real problem I had with the game is how insanely slow the start is, a lot of the earlier parts should've been condensed so the tanta sila fight happens much sooner since that's when the game starts kicking into high gear; from there it's just smooth sailing with great action, great traversal, great soundtrack and collectable cats.