I heard flashback Rosa call one of the guys papi so I figured she was part of the hispanic group. But present day Rosa? I didn't know her name and could not make out her accent, also thinking it sounded Russian. Because of that I thought the flashback was for the kitchen woman who has the fewest lines. It wasn't until the boy finds out he is in remission that I realized it was for the older chemo woman! I also then realized the cars they were driving in the bank robbery scenes were pretty old.