Breather Episode: The school dance is this even In-Universe. Their trap to catch Cinder in the CCT aside, everyone is still reeling from watching Fifer die and need a break from the investigation to help de-stress.
Call-Forward: Jaune mentions his sister Saphron when talking with Pyrrha.
Mistaken for Gay: When Amy and Pyrrha go to the dance together, Jaune mistakenly thinks it's in this sense.
No Endor Holocaust: Averted. The events of Sonic Adventure and Sonic Unleashed were known for their large, city-scale level attacks by Perfect Chaos and Dark Gaia respectively, however, there weren't exactly any documented casualties of their extreme attacks. The fic acknowledges that, yes, there were indeed massive casualties, a fact that the heroes reflect after Fifer was killed by Cinder in front of their eyes.
Tragic Keepsake: Sonic is still wearing Chip's necklace as a bracelet.