Hi, this is Kai.
Kai is a bit of a scholar, a student really if you will. He's a darksider, naturally gifted if one might call it that. Grandson of
Taeli Raaf
who seeks friendship at a distance and a possible mentor in the Sith-related arts!
Unless there's some reason the Marr's would be at odds with him (and possibly even then) Elise might also work on friend side. As far as any possible mentor stuff....ehhh, technically Elise DOES know stuff. Plenty of stuff. But she's got her own philosophy about the dark side, and on top of that philosophy, doesn't genuinely care much whether or not people get it right, and certainly whether or not she does. I based that part of her character around the idea that the dark side is more instinct and emotions, and so things like rage, enhance attribute, and sensory abilities are all what the dark side is about. Whereas all the fancy rituals and stuff she views as being almost jedi like, she also sees a lot of the politics the same way.
And yet with all that, she's very casual and probably takes some of the most leisure time of any sith without going out of practice or something.