So, they were assigned to the same case during their time at VILE but Mason got caught. We know that when two operatives are paired, they are assigned by a higher up, and hardly work together (in WOEICS anyway)
You know, I think the Netflix Carmen would have been better if they had done good flashbacks. Carmen was a teen right? Why not do flashbacks of when Carmen and Chase were partners and working together? Or when Chase was chasing Carmen? Or more about when Carmen quit?