Acting for Two: Keston John provides the voice of both Hordak and Horde Prime, who speak to each other in "Destiny, Part 2". He also provides the voices of all of Horde Prime's clones in Season 5.
Actor-Inspired Element: Many of Glimmer's personality quirks came from Karen Fukuhara's performance as her. In particular, ND Stevenson stated that if the show was ever allowed to use a swear word, it would have gone to Glimmer, as Fukuhara swore constantly whenever she flubbed a line.
The Kyle/Rogelio ship received this, mostly because it was deliberately created by the storyboarders and freely shipped among them, which is why they show up in the background together so often.
ND Stevenson constantly retweets fanart and cosplays of the series, most notably a marriage proposal done in Catra/Adora cosplay ("hello i am fully crying"). He later referenced said proposal at 2019's Emerald City Comic Con as being his favorite fandom experience to date.
In an interview, Aimee Carrero has stated she enjoys seeing the fandom ship Catra/Adora and Catra/Scorpia.
Both Aimee and AJ Michalka have expressed their desire to work on a movie, enjoy the relationship between their characters and have positively squealed about the hypothetical lovechildren many fans have created for Catra and Adora.
Ray Geiger, Josie Campbell, and Keston John all ship Hordak/Entrapta and have retweeted fanart of the two characters together.
J. Michael Straczynski, co-creator of the original She-Ra: Princess of Power, is supportive of how ND Stevenson has taken the reboot, saying that She-Ra is in "good hands". He's also defended the Age Lift and artstyle change from the complaints that sprouted when the show's art was first released, stating that She-Ra is "a warrior, first and foremost."
Awesome, Dear Boy: Geena Davis was touring the studio for her foundation aimed at increasing female representation, and announced that if any shows wanted her to do an appearance they just had to ask. She became the voice of the badass Huntara.
ND Stevenson has said in interviews that Foe Romantic Subtext is one of his favourite types of character relationship, hence Adora and Catra. Previous works of his, including NIMONA and Runaways (2015), also centered on rivals-veering-on-lovers.
In post-Season 5 interviews, ND said that while there was an important story reason to cut Catra's hair, to better see the mind control chip, they also just really wanted to see Catra with short hair because they thought it would be cute. On top of that with short hair Catra resembles ND's real life wife Molly.
One of the show's tie-in books misspells Glimmer's name as "Glitter" on one page.
A December 7th, 2019 article at Screenrant referred to Hordak as "Hordak Junior" and Horde Prime as "Hordak Prime". Unfortunately, several reviewers and fans have referred to Prime as "Hordak Prime" ever since.
Creator Backlash: Following the show's first official trailer and the divisive reaction from the Internet it got, Melendy Britt, who voiced She-Ra in the original 1980s series, wrote on her Facebook that she disapproved of people (including members of the reboot's crew) putting down the original show in favor of the reboot, feeling this was disrespectful to the crew and fans of the original She-Ra. She later posted on her Facebook praying that Masters of the Universe: Revelation will "honor the original" as service to the "loving force" of He-Man's original fans and wrote in the tags that "[you] cannot replace the originals with copies", seemingly as shade towards the new She-Ra seeing as Revelation is a continuation. She also accused Dreamworks and news sites of hiding and downplaying criticisms made towards the reboot to make it look more marketable.
Creator's Pest: Played for laughs, with the show's crew regularly poking fun at Chew Toy Kyle when talking about the show.
Descended Creator: Spinnerella is voiced by series showrunner ND Stevenson.
Diagnosis of God: Entrapta is a genius primarily concerned more with science than with morality, has difficulty making friends, only eats food prepared a certain way, and little in the way of social tact. Given that it's a fantasy world, no one outright calls her autistic until character designs for Season 4 confirmed it.
Dueling Works: With Star vs. the Forces of Evil, as both works feature a blonde Magical Girl princess with a powerful magical artifact, and who must struggle with growing responsibilities that involve fighting a cadre of evil forces who seek to destroy everything they hold dear. Funnily enough, Molly Ostertag (She-Ra showrunner ND Stevenson's wife) served as Star's prop designer beginning with its second season.
Exiled from Continuity: In 2011, while Universal gained ownership of the Masters of the Universe franchise from Mattel, the latter still had first rights/options for anything regarding the He-Man side of the brand until 2023. This resulted in the He-Man characters being unavailable to appear in this series, as Mattel was attempting to make use of them in a Sony live-action film at the time (which got stuck in Development Hell and ultimately canned). Eternia would still serve as an important part of the titular character's backstory and the show's lore, however.
Executive Meddling: A good version. ND revealed in an interview that it was actually a development executive by the name of Beth Cannon who first proposed that Adora and Catra should be friends in the Horde.
The character designer behind Perfuma went on record saying that they intended Perfuma to be a trans woman, but never pushed the issue beyond subtle touches to her design, since they didn't think Dreamworks would let them get away with it. Season five of the series introduces an actual trans man, meaning that it's possible that Perfuma could have been canonically trans if her designer hadn't been afraid of executives shooting it down.
Fake Nationality: The Caucasian Adora/She-Ra is voiced by the American-Dominican Aimee Carrero.
Karen Fukuhara, the voice of Glimmer, played Katana in Suicide Squad.
Producer "Chuckles" Austen is in fact Chuck Austen, who was essentially excommunicated from the comic book industry after several infamous runs on various Marvel and DC titles, most notably the X-Men. Strangely enough, he's had a pretty good track record for his directorial and producing work in TV animation, working on series such as Steven Universe, Penn Zero: Part-Time Hero, and The Adventures of Rocky & Bullwinkle. Granted, he wasn't a writer on any of these productions, which may explain it.
Invisible Advertising: Mattel wouldn't so much as allude to the series on their official channels until June 2019. Before then, the only Masters of the Universe works discussed were the classic He-Man and She-Ra (through various new products) and the forthcoming live-action film. In the case of the latter, the same week Season 2 debuted, Mattel gave the go-ahead for actor Noah Centineo to announce he would be playing the live action He-Man when he was a guest on The Tonight Show Starring Jimmy Fallon, while their Licensing Expo meeting for 2019 focused on the film as well. It would take until June 2019 for Mattel to announce a line of She-Ra dolls would be sold as Target exclusive items in August of that year, with the dolls quickly marked at discount or otherwise hard to find.
Mere months after the show concluded, Mattel did start creating new She-Ra toys, as part of their Masters of the Universe line, with She-Ra a part of Wave 3 and Hordak a part of Wave 4. The artwork and designs, including a mini-comic, are completely divorced from the Princesses of Power versions.
Line to God: A lot of the crew members have Twitter accounts and are known to freely interact with the fans and give them information about the show and their own opinions.
AJ Michalka (the voice of Catra) and Mary Elizabeth McGlynn (the show's voice director) previously did voice roles in Steven Universe together as Stevonnie and Dr. Priyanka Maheswaran respectively.
Real-Life Relative: In the Brazilian dub, Catra's voice actress Fernanda Baronne is the sister of Glimmer's voice actress Flávia Saddy. Both of them are daughters of Marlene Costa, who voiced Catra in the 80s show. In Fernanda's case, it's also kind of a Casting Gag, as she "inherited" Catra's role from her mother.
Release Date Change: The show was originally meant to come out on November 16, 2018, but was moved to three days earlier on November 13.
Role Reprise: In the Latin American Spanish dub, Hordak is voiced by Humberto Solorzano, who voiced him the original 80s series... but he only voiced him as The Other Darrin in place of new voice actor Jorge Roig in a single episode.
Teasing Creator: After the release of Season 5, ND revealed during a livestream that they had written a fanfic for the show and uploaded it to Archive of Our Own, challenging fans to try to find it. Evidence suggests that it's Don't Go, which contains a scene that perfectly matches some artwork that ND released a few days prior, but ND has remained silent regarding whether this is the case.
During a November 5, 2019 Patreon discussion with fans, character designer Ray Geiger said that Horde Prime had performed a "full reset" on Hordak in "Destiny, Part 2", and that "Hordak is gone." Hordak fans and Entrapdak shippers were understandably upset. In a May 14th, 2020 tweet, Geiger told a fan "he died last season!". Season 5 revealed that Geiger was lying, and that Hordak and his memories were very much intact, just suppressed. By the end of the series, Hordak is mentally whole again.
When replying to Ray Geiger's tweet asking for "Season 4 spoilers, wrong answers only", ND Stevenson responded with a bunch of ridiculous scenarios including legitimate spoilers for Season 5.
A frequent tradition by ND on the day of season premieres was to tweet a summary of that season in emoji form. For the Season 5 emojis, ND didn't include any for the last episode, leaving the summary on a dark note and teasing a dark ending.
The name of the silent, Lizard Folk member of the cadet squad was first revealed on Twitter to be Rogelio. It gets lampshaded in the second season when Lonnie drops his name for the first time and has to remind Scorpia who he is.
Word of Gay: It has been implied by some storyboard artists that Rogelio and Kyle are something of an item. It was later explained that this is a ship the storyboard crew created and were fans of, and after the first season was released, got the writing staff interested in too.
A storyboard artist explained that the weird characterization of Kyle, in particular him telling Bow that he has no friends when he's repeatedly shown to have a close bond with Rogelio, is the result of the storyboard team creating the Rogelio/Kyle relationship without telling the writers. The same artist offering her own personal theories, such as Kyle and Rogelio having an on-again off-again relationship, that Kyle can't communicate properly with Rogelio, or that he has a boyfriend in Rogelio but no friends.
Character designer Ray Geiger says that Entrapta is 25-35 years old.
Ray Geiger gave their idea of what the child of Scorpia and Perfuma would look like.
During a live stream, ND and Molly gave us Finn, Catra and Adora's non-binary child.
On her Entertainment Weekly Q&A, Aimee Carrero thinks Catra is a Pisces because she's very emotional and Adora is a Capricorn as she is task-oriented. While Adora is a Capricorn as she was born on January 19, Catra is canonically a Scorpio (birthday is October 28).
There's this very specific feeling when you're a woman in a male-dominated industry, and you start moving up and hearing all these stories about the women who came before you who were "crazy" or washed out. And you think you can avoid those things by doing everything right, but as time goes on the same stories start to be told about you, and you realize that there is no doing everything right. You're put in that role no matter what you do. For me the thing that helped the most with that was reaching out to other women and asking how they dealt with it - it makes you feel less alone, less crazy. So I think that's what Mara and Adora are to each other.