Thinking about how Marcy probably trusted Simon so quickly because he was the only one who looked like her
Also thinking about how she’s the only one in ooo who remembers what is was like to be a human before the mushroom war
Also thinking about how music is Marceline’s entire life because her mom and then Simon and then the human survivors all taught her songs to get her through hard times when she was a kid/mortal and so now whenever she doesn’t know what to do she plays a song
Also how Simon sang the cheers theme to stop himself from forgetting when he put the crown on and ice king still remembers the song he sang to Marceline in the dark cloud