Divinity: Original Sin Enhanced Edition

So "Platinum" was received. And this trophy was received accordingly.
I specifically created a new user to understand how this trophy appears in the game and confirmed my guess about this.
Attention! None of the tips people have written here are correct! Your words regarding Bairdottir are of great importance for this trophy. To get your point across, listen to what Bairdottir says when meeting Jareth and if you gave the wrong answers when communicating with her.
“And you... you, seekers of the Source... you yourself told me about the virtue of obedience. You revealed to me a world that turned out to be wilder than my native forest. More terrible and dangerous than I could imagine...
Jareth is right, my friends. Everything he told me turned out to be true. You may not understand his methods, but I am sure that he serves the greater good." After this, Bairdottir goes over to Jareth's side and you do not receive this trophy.
Now listen to what Bairdottir says if you gave the correct answers when communicating with her:
“But I also realized something else. The human world turned out to be much wider and more complex than I thought when I was fighting for life in my native forest. I couldn’t even imagine how much more complicated... And I realized that my master and friend was completely not who he looked like in my innocent eyes...
No, Jareth. I can't follow you. After what you did. After what you have become.
I need myself. And I myself will rid the world of this Immaculate scum. Starting with you." After this, Bairdottir stays with you and you receive the "Papa Lucifer" trophy. And then Bairdottir will say: "That's it, Jareth. Thank you - and goodbye."
Do you understand what this means? You need to use your words in relation to Bairdottir, bring her closer to the human world, and not push her away from it!
Now look at the “Guide to completing the “Valiant” difficulty level” that I wrote. It describes all the actions that you must do to obtain this trophy and the same applies to “Properties”.
I'll tell you right away. You won't get this trophy quickly. You'll have to go through all of Saisil and King Brakk. All of Hiberheim and King Boreas.

If you didn’t get knocked out during the first playthrough, then you can use the guide on the speed limit of the “Sister of Mercy” trophy. (Independence can be upgraded at the beginning of the game, where two drunken guards are standing) After completing it, you need to teleport to the “Waterfall” portal, rise a little higher, and return along the wooden bridge back to the previous location, so you will exit right under the village “Sacred Stone” ". Then, with one hero on stealth, go to the blood water supply and the entrance to the cave, port Baitodir and the second hero to it using the pyramid. Then you go and talk to the NPC, you don’t have to defeat him, the trophy will drop anyway.