* FanNickname: Rea is called "[[Manga/ACertainScientificRailgun Zombie Saten]]" in certain corners of the internet. The anime aired during the same season as ''Manga/TasogareOtomeXAmnesia'', whose female lead Yuuko is similarly known as "[[Anime/GaReiZero Ghost Yomi]]".
* KeepCirculatingTheTapes: A weird example pertaining to a specific cut of the anime; when Creator/FUNimation found out they got the censored masters, they later got the uncensored masters, re-released the series in that form, and discontinued the censored sets. While most fans prefer the uncensored cut, those who want the censored cut, even if only for completion's sake, may wanna look around a bit.
* RelationshipVoiceActor: The English actors for Chihiro and Rea played another lead couple in ''LightNovel/CatPlanetCuties''.