Seeing as Papyrus is experiencing an all new Human Anatomy, he'll probably be doing his own nervous trips to the hospital or pharmacy with questions. A chance to cross paths, at least! I don't know how Papyrus might begin to pick up on his background, but if they pick up some cr, I would be curious to see how Rodion would respond to Papyrus's type of encouragements to be a better person (turning oneself in to law enforcement not necessary).