History Trivia / TheCaligulaEffect

** In the game, Mifue (and by extension, Mirei) was originally going to have a whip as her weapon, but it was too difficult to animate on the Vita's hardware, so they went with a [[DropTheHammer hammer]] instead. In ''Overdose'', Eiji and Stork ended up using whips.

* TheWikiRule: [[https://caligula.fandom.com/wiki/Caligula_Wiki Caligula Wiki]].

** In the game, Mifue (and by extension, Mirei) was originally going to have a [[WhipItGood whip]] as her weapon, but it was too difficult to animate on the Vita's hardware, so they went with a [[DropTheHammer hammer]] instead. In ''Overdose'', Eiji and Stork ended up using whips.

* ActorAllusion: The concept of the virtuadolls is a thinly-veiled reference to the {{Music/Vocaloid}} phenomenon, with µ being an {{Expy}} of flagship character Hatsune Miku. So it stands to reason that [[{{Creator/AsamiShimoda}} Asami Shimoda]], whose most famous role is that of Miku's successor Vocaloids Kagamine Rin and Len, would voice µ's counterpart virtuadoll Aria.
* ContractualPurity: In a similar vein to the infamous case from ''Manga/{{Kannagi}}'', this reaction occurred in the Japanese fandom with Kotono and TheReveal that [[spoiler:she's a single mother]].

** The anime went through a few concepts for Ritsu before settling on what they did, including him being a sentient virus made to counteract μ and an elderly man on his deathbed.

* ActorAllusion: The concept of the virtuadolls is a thinly-veiled reference to the {{Music/Vocaloid}} phenomenon, with µ being an {{Expy}} of flagship character Hatsune Miku. So it stands to reason that {{Creator/AsamiShimoda}}, whose most famous role is that of Miku's successor Vocaloids Kagamine Rin and Len, would voice µ's counterpart virtuadoll Aria.

* RealLifeRelative: The male and female protagonists are voiced by siblings Chiharu Sawashiro and Creator/MiyukiSawashiro, respectively.