I would love, love, love to work out something between Cee and Six. They've got somewhat similar backgrounds: Six is from the other side of the law, an ex-hooker turned courier and lieutenant for a shady af Las Vegas tycoon, but they both come from military stock out west, and both went full wayfaring stranger post-zpoc only to land at the Saviors and think, 'well... huh. Ain't this just peaches.' Cee is such a BAMF, and Six isn't used to running into folks she deems worthy of respect. Cee would abso-freakin'-lutely fascinate her. And given they both came from a generally westerly direction, it may be a little fluky but there's always a chance they could've crossed paths before if you were interested in taking it that way.
Six is also... kinda... plotting to seize control of the Saviors. Good intentions, highway to hell, et cetera, ad nauseum.