system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] Can Sith have friends?

I was debating this with my friend. She says, at best, Sith consider everyone else to be expendable tools. I think everyone needs a friend. Case in point: Vader and Tarkin. Who’s right?
gpt
"Proper" Sith as Darth Bane would have them see everyone and everything as tools to be used, rivals to be destroyed, or too weak to be noticed.

With that in mind, Darth Vader is kind of an oddball Sith, since on some level he respected the stormtroopers that served under him, probably because they reminded him of the clones he served with during the war. And you mention Tarkin, Vader clearly looks at him as an equal, or at least within the same order of magnitude of himself, again because of the times they worked together during the Clone Wars.

And what ties it all together is that the Emperor never intended Darth Vader to be a proper Sith anyway - he replaced Bane's Rule of Two with his own Rule of One - that he would become immortal and rule the galaxy forever. As such, he probably never bothered instilling Darth Vader with the proper old-school Sith mindset. He just taught him how to use dark side force techniques, taught him to channel his rage, resentment, and frustration, and set him loose.