* AlternativeCharacterInterpretation: Some have suggested that Karasuma volunteering Alice was actually an attempt to punish/get back at her for correcting her in the middle of class.
* BigLippedAlligatorMoment: This is a light-hearted comedy series, so it's not like anything is meant to be taken too seriously... but the musical number Shino narrates from the middle of episode 12 onward pretty much comes out of left field. How does one go from talking about {{chuunibyou}} to the Little Mermaid anyway?
* EnsembleDarkhorse:
** As of season two Honoka Matsubara has become popular as a character who loves Karen almost as much as the fandom, as well as moving Karen out of the Third Wheel House. She also made the cut on the launch day roster of ''VideoGame/KiraraFantasia'' for this reason, which is no small feat for a MassiveMultiplayerCrossover.
** Kuzehashi-sensei and her attempts to become more open with her "Cute" students have endeared her to many fans.
* FanNickname:
** Karen's is "Brit-chan" due to her trademark Union Jack blazer.
** For Chinese speakers Shinobu is known as Uncle Shinobu, owing to her occasional DirtyOldMan-ish outbursts of RaceFetish.
* MemeticMutation:
** "Get Married! Get Married!"[[note]]In the beginning of the opening theme song, the word kekkou(結構, 'fine, very well' or 'quite, pretty much') can be easily misheard as kekkon(結婚, getting married).[[/note]]
** ''The'' Ayaya scene. [[https://www.youtube.com/watch?v=uIauXFVABIQ See here.]] This one scene has spawned numerous memes since the anime premiered in 2013.
*** Several ''Manga/JoJosBizarreAdventure'' variations: [[https://www.youtube.com/watch?v=0PrmMLvHAk0 "AWAKEN, MY MASTERS!"]] and [[https://www.youtube.com/watch?v=0aVBvY0jIxc "Ayaya's Bizarre Adventure"]]
*** [[https://www.youtube.com/watch?v=rGy6FuGdeYk "AYAYAYAYA!"]], the Ayaya scene set to music.
*** Even the Ayaya ''face'' has become a meme, resurfacing in 2017 on Website/{{Twitch}} TV. Fans of the show made a [[https://www.frankerfacez.com/emoticon/162146-AYAYA FrankerFaceZ emote]] for Twitch, and it has since become [[https://www.frankerfacez.com/emoticons/?sort=count-desc one of the top 15 emotes]] in channel usage as of October 2018. Of course, individual Twitch channels took notice and since then it has become [[https://twitchemotes.com/search?query=ayaya one of the most popular paid emote variations]] on the entire site, with over a hundred variations that artists had made for streamers to use.
*** Watching AYAYA for [[https://www.youtube.com/watch?v=D0q0QeQbw9U 10 whole hours]], usually as a bet or subscriber goal on Twitch.
*** Then there’s the connection between the meme and [[Franchise/TouhouProject Aya Shameimaru]], due to her [[MemeticMutation catchphrase]] being “Ayayayayayaya!”
** ''[[Manga/JoJosBizarreAdventure JoJo]]'' fans who watch ''Kiniro Mosaic'' quickly started cracking jokes about how Karen ''Kujo'' is related to Jotaro Kujo. Aside from the name, it helps that they're both part-British on their mothers' sides, part-Japanese on their fathers' sides, and their families are both wealthy. Karen even tries out the delinquent style (which Jotaro represents fairly well) on a couple of occasions.
** [[https://i.kym-cdn.com/photos/images/newsfeed/000/779/081/10a.jpg "Getting more waifu will destroy your laifu."]]
** [[https://i.kym-cdn.com/photos/images/newsfeed/000/947/827/330.jpg "Show me the booty! I need the booty."]]
** A remix of Karen's "Desu" set to [[VideoGame/SuperMarioGalaxy2 Puzzle Plank Galaxy]] has become quite popular, especially the [[https://youtube.com/watch?v=60mLvBWOMb4 10 hour version]].
* {{Moe}}: Just about everyone in the show is adorable, with Alice being the most prominent example with her shyness, petite figure and friendliness, and is even called Moe InUniverse by Youko. There's also Shino and her love for Alice and Karen, Aya and her crush on Youko, Youko and her motherly instinct towards her friends and Karen and her cheerfulness and energy. Even the two sensei are moe with Karasuma being a friendly {{Meganekko}} and Kuzehashi's desire to get closer to her students.
* SurprisinglyImprovedSequel: The consensus is that ''Hello!'' is a huge improvement on the first season, building on the already-established characters and their interpersonal relationships, and what's more, seamlessly adding in new characters that the existing cast bounce off well (see Kuzehashi and Honoka for Karen).
* SugarWiki/SweetDreamsFuel: The show is very fun and relaxing, just the thing needed after a stressful day at work or school.
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