Ah I feel the feels even when I don't know the backstory to this! but I'm dying to know!! Please someone tell me which episode this is from?! And I shall surely feel even more feels after I do! and possibly cry myself a river and drown X( Simply amazing how your drawing moves people especially AT fans like us! Good job!
Little Marcy and Simon appeared in a small flashback at the end of "I Remember You". Basically, poor little Marcy was scared and all alone, crying in the wasteland of what used to be the city. Simon runs over to her, dries her tears, and wanders over to a toy shop in ruins. He picks up a teddy bear(which will become Marcy's favorite thing in the world, Hambo) and hands it to her as Marcy smiles once again. More of their relationship can be seen in the episode aptly titled "Simon and Marcy".