grace having the vocal capacity of an asthmatic toad (which rocky knows bc grace once tried to sing a note and rocky almost shattered his xenonite ball to get him to shut up) and simon having an astounding singing voice (he sings something that grace identifies as an old korean folk song when he thinks no one is paying attention to him) that wins him a lot of points with his very musical new alien friend
simon humming nursery rhymes and rocky trilling along in harmony as he makes up lyrics in eridian that grace translates to himself as some variation of "sweet little simon / far away from mars / but he will be home soon / saved by the stars"
(grace cries like a baby but can't tell a very concerned and confused simon why, bc rocky made him swear on adrian to not tattle)
