Ah, yeah, I personally would have arranged some of her stats a liiiittle differently, and I did initially play her a bit more solemn, standoffish and stoic--save where Ch'dau was concerned--buuuuut that got real one note for me after a while. Maybe I should try to RP her stats better.
You know what, Eol, you've convinced me, Kith's about to get 10 times less charming *cracks knucks* here we go!
... Jk there's no way at this point.
Interestingly (maybe), Shiv alternatively has a little bit of a higher CHA but she's more serious unless she really needs something--I guess she kind of tries to use her cha the way Kith used her sticky fingas.
tl;dr: I am the worst at playing to my CHA stats and I am sorry. The end.