* FauxSymbolism: The [[SiblingYinYang yin-yang inspired statues of the royal sisters]], and Arcanus recalling that some historians spoof the symbol's meaning with [[BlueAndOrangeMorality blue and orange]] are both subtle [[StealthPun jokes]] that play off the names of those tropes without really symbolizing anything.
* HilariousInHindsight: Celestia states in chapter 2 that [[DarkIsNotEvil Luna would detest the notion that her night represented evil]]. This chapter was published ''before'' the airing of [[Recap/MyLittlePonyFriendshipIsMagicS3E1TheCrystalEmpirePart1 the season 3 premiere]], in which she refers to King Sombra's evil heart as being [[DarkIsEvil "black as night."]]