Do you pursue the romance with the Emperor?
Nope, I had no interest in romance with him and rejected the use of tadpoles. The only reason I sided with him was because his support was overwhelmingly stronger than anyone else's. If the game had a scene where Voss and his team sacrificed their lives - say, to help us escape an army of mind flayers - and his last words were "Promise you'll do everything to protect Orpheus and Lae'zel" - that would've been a waaaay more compelling dilemma for me.
Lae'Zel choosing to stay with you after you become a mind flayer is the greatest act of love and devotion in the game. She is the ultimate ride or die girlfriend.
I didn't reach this moment. It was very difficult to recognize her love and devotion behind her regret of not killing me in the camp.