That was the only one I was able to find across Gustav and Shared.
I tried Night_ and other companion names.
Shadowheart has things for her playing with the box and almost losing control, currently in game, but also one for her fight with Lae'zel and one for her delivering/being delivered an ultimatum of some sort. Wyll's relate to Mizora or Spike, or the goblin you speak to when you save the deep gnome. Astarion has 3, called "sneak off" "hunger" and "bite." Lae'zel only has one and it's after you meet the Gith at the chokepoint. Gale has the most - something about him learning a spell some time after triggering the ceremorphosis dreams, one suggesting he can teach the player a spell, him asking for magical items and one that says: "Enough nights have passed since NIGHT_Gale_LearnSpell for NIGHT_Gale_Loss_Ready." He's the only betrayal one I've found. Maybe it's just if you don't ever give him a magical artefact?
Shadowheart's ultimatum is how the dev called her visit at the camp if you don't recruit her. That's already in-game.
I'm pretty sure every characters can "betray/ditch/remove from party" moment.
Gale with Raphael. Shadowheart: can die at the ultimatum scene, die in the fight with Lae'zel. In Act 1 B, she (might) leaves the party to do what Ketheric wants. She also leaves if approval is too low, she gives 2 warnings. Wyll: leave the party if you side with the Goblins. Lae'zel: can die while fighting Shadowheart (there is a line of dialogue for her having exploded that reference Shadowheart's weird magic might I add), can die fighting you after the first tadpole dream. Astarion: you can give him to the Gur and there is a vampire ambush in Act1 B that related to his "origin moments". Will probably also betray you at Moonrise Tower as he wants to control the tadpole, not get ride of it.
I once said that it is unlikely we can keep a full party before Act 1 even ends.
