I don't know if Semya is going to be a literal family or more a metaphorical one, but regardless I would be interested in playing a 'heir' character, either Rajani's actual kid or just a gembound he finds at a young age and takes under his wing. [if the former I'd give you magicka for the give life/stone] Their actual personally would depend on how Rajani treats them, but they'd most likely try to outwardly mimic his ruthless and distant attitude. Of course, this would probably be a far future thing seeing as Rajani is a kid himself [unless you want a big brother/little sibling dynamic]
Otherwise I have
Huntsman who is going to be affiliated with The Organization. I don't know if he'd have enough commitment to formerly join Semya, but he could still work with them on occasion. Although whether they'd actually get along or becomes rivals/enemies probably wholly depends on how their first interaction goes.
Tova is another option, although im not currently active on them and I don't know when that'll change. She's highly motivated by knowledge and secrets, and rather ruthless and methodically when going about getting what she wants. Empathy is not something that comes naturally to her, and in this environment that would probably be exacerbated considerably.
@Rajani