After game is finished and some time has passed, I systemized my thoughts about it
It goes like that - stone cold warrior with a heart of ice melts after being exposed to genuine affection.
Act 1:
Assuming that you didn't killed her in cage and have met other gith on northern part of the map, it opens her affection bar. And if it high enough, there will be a sex scene, where you can have your first check of intimidation, saying that you will be in charge. Suffice to say, she will like it.
After you visit kreshe and she volunteers into purification device, you can convince her that there's no cure and this device is euthanasia machine/mind sucker and something rotten in gith kingdom. After it, when you venture inside of the artifact, there will be a fight, where you can further tell her that queen wants her death. After it, her tone in dialogues with you changes. Later in camp she confesses to your character is barged into her thoughts and she can't think of anyone else. That's it for act 1
Act 2:
During one of the long rests, there will be a dialogue, where she challenges you to a fight. Because she knows nothing else and gone crazy with emotions. If you win, she confesses to you. Later, you can have a skill check, that opens an option to kiss her. At first she doesn't understand why to do it. If you pass, it goes to act 3
Act 3:
She just confesses her love to main character. Point being, that she was battling for githyanki her whole life, but main character showed her that there's more in life than fighting. No end slideshow of happy ending. But it's on Larian