* ActingForTwo: Notably averted in the Korean dub, with Chii and Freya having different voice actresses. Played straight with all the other dubs which have the same voice actresses for both.
* CrossdressingVoices: Minoru is almost always voiced by women, with the notable exception of the Spanish dub, where a guy voices him.
* TheDanza:
** Ueda is voiced by Creator/YujiUeda.
** In the Korean dub, Takako has the same [[DubNameChange Korean name]] as her voice actress.
* {{Defictionalization}}: The first two books in the ''City with No People'' series that Chi reads were published in a set along with a read-along CD.
* PlayingAgainstType:
** Creator/CrispinFreeman, normally playing serious and dangerous badasses, both good and bad guys, plays the comedic, perverted and inept everyman, Hideki.
** Much like Crispin Freeman, Creator/SteveBlum usually voices badasses and villains. Here he plays NiceGuy Mr. Ueda.
* ReferencedBy:
** "[=ID1=]" by Music/PorterRobinson is a remix/uses samples of "Let Me Be With You", the anime's opening theme.
** Mod The Sims, a DownloadableContent site for fans of ''VideoGame/TheSims'', has one of its download manager bots named Chii. The site's Chii bot also used to perform various functions in the chat room, such as "gets you coffee" when the command "!coffee" was typed.
** One item sold on ''Website/GaiaOnline'' to customize a user's avatar is the Robot Ears, which look almost exactly like Chi's UnusualEars.
* StudioHop:
** The manga series was originally printed by {{Creator/Tokyopop}}, and has since been re-released by [[Creator/DarkHorseComics Dark Horse Manga]] in two omnibus books.
** The Japanese home media rights are currently owned by Creator/NBCUniversal thanks to their buyout of [[Creator/NBCUniversalEntertainmentJapan Pioneer LDC/Geneon]] in 2008.
** In North America, the distribution rights were handled by Pioneer Entertainment. It has since been transferred over to Creator/{{Funimation}}.
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