I've always liked Riley and Cindy. In the comics Cindy is in Huey class, even though she tries to get Huey to play along with her games but Huey is having none of that shit.
Cindy meeting Riley she immediately copies his smack talk and it becomes a game of who can break who, which Riley does albiet Granddad gossip.
In the Fundraiser this get's played up a lot more. Riley seeks out Cindy this time and the two act last gangster throughout the whole episode. Both Cindy and Riley break at the end when bullets start flying, you can hear Cindy break character screaming "I want to go home!"