Facts about my STH AU (and some memes and songs)

Hush, little Emmy (AKA, Emily's favorite lullaby)

Sonic sings "safe and sound" (by Taylor Swift) to Emily after a terrible nightmare. Emily's scared for about four or five minutes before she's calm enough to wake Sonic up.

Neither Sonic or Emily know how or why this lullaby specifically soothes Emily and puts her back to sleep, something about the song just calms his precious daughter.