Making companions sith

I’ve just finished KOTOR 2 as a light side, and now starting my second run as a dark side exile. My question is this: before making companions jedi, you need to gain influence, which generally means making light side choices. So if I were to make companions sith while doing a dark side run, do I have to make those same light side choices in dialogues? If so, I think it would kinda ruin the immersion a bit.