The inhabitants of "Nunnery" who are Otaku in some way or another. Their apartment is owned by Chieko's mother, who has gone abroad to follow her fangirl crush. Although Chieko is the manager, Mejiro-sensei the resident Mangaka enforces a strict "No Men" rule and employs the other inhabitants as assistants.Tropes applying to all of the "Nuns" are:
Heroic BSOD: Happens to her on a regular basis, with its triggers including, but not limited to: finding out that Kuranosuke is a boy, hearing him tell her that he wanted to see her again, being hugged by Shu in the aquarium, and having Kuranosuke walk in on her when she pretends to dress up in a lacy jellyfish dress.
Let's Get Dangerous: She manages to push her social phobias aside long enough to demand that a single jellyfish be moved to a safer tank. Don't get in her way when she's making a jellyfish dress, either.
Meaningful Name: The kanji for Tsukimi (月海) reversed can be read as "kurage" (海月), or "jellyfish".
Felony Misdemeanor: "Don't put shiratake noodles next to the meat! Unless you want it to be hard as a rock!"
Funny Afro: Kuranosuke eventually gives up on trying to style it and hides its massive weight under a short blonde wig. However, it's surprisingly popular with the Stylish (they ask to touch it) and it's what ultimately inspires a model in Yokohama to accept the girls' jellyfish dresses at a fashion show.
Jiji is one of the Amars who is obsessed with mature, old men.
Comically Missing the Point: When the neighbors of the Nuns' house are evicted, instead of worrying how soon the same fate may come to them, she bemoans the fact that she no longer has an attractive old man, who had been "maturing so beautifully" in her neighborhood.
Precocious Crush: Toward Kuranosuke's dad. And any other man much older than her.
The rarely seen mangaka of Yaoi who advises and regulates the other residents.
Disproportionate Retribution: When Tsukimi writes her a letter asking what the punishment would be for bringing a man into the house, she covers up Tsukimi's message with a single, giant message: "DEATH."
The Ghost: Never once comes out of her room during the entire anime series, communicating only in writing through the crack below her door.
Reclusive Artist: An In-Universe example. Perhaps it is this reclusiveness that allows her to, having not argued about it at length, design the final logo for the jellyfish dresses.
Black Sheep: He's the only person in his family who has no desire to go into politics. Instead, he wants a career in fashion.
Camp Straight: Cross-dresses, dreams of entering the fashion world, all his friends are girls...and yet, he really is straight!
Chick Magnet: Discusses the fact that he has no difficulty attracting the hottest and most popular girls so he's surprised to find himself falling for Tsukimi.
Determinator: He's not one to give up, even when everyone else is.
Dude Looks Like a Lady: Enough that, when the Nunz discover his breasts are fake, they instead jump to the conclusion that he's a very flat-chested girl wearing inserts out of insecurity.
Expy: a flamboyant blonde kid who is the illegitimate son of an extremely rich and powerful individual in Japan and was ripped away from his European mother at a young age. He marvels the poor and nerdy main character with his sense of money, benevolently manipulates her for his own purposes, and eventually falls in love with her. Why does this sound familiar?
Fake Boobs: When Kuranosuke passes out in the lobby of their apartment building, Mayaya attempts to help by applying Vicks Vapo-Rub to "her" chest, and in the process discovers that Kuranosuke's breasts are fake. Mayaya and the other members of the Sisterhood present completely miss the obvious and instead accuse Kuranosuke of padding "her" bra to hide her A-Cup Angst.
Gender Vocabulary Slip: Slips into the ore pronoun, but since he's so good at cross-dressing, he still passes as a bokukko (with a bit of help from Tsukimi).
Hidden Depths: One of the reasons Kuranosuke cross-dresses, revealed late in the series, is a desire to connect with his absent mother, who often gave him pretty things and showed off her dresses to him; not to mention a half-subconscious belief that, if he had been born a girl instead of a potential heir, his mother might not have left/been separated from him. The series leaves the exact nature of her departure unexplained.
Stupid Sexy Flanders: A lot of male fans state-side have really taken a shine to Kuranosuke's "Kurako" persona as of late. Not to mention the fact that both the Koibuchi family's house staff and Prime Minister/Uncle Negeishi's aides have noted that he is quite the looker, and very attractive. Even Inari's assistant/co-worker agrees, much to her vehement chagrin.
Adorkable: Especially when he's crushing on Tsukimi. He's a successful businessman and respected member of the society, but he has no idea of how to function in dating and relationship world.
Loves My Alter Ego: Falls for Tsukimi's "After" mode. Doesn't recognize her and ignores her in "Before" mode. In the manga he eventually figures out they're the same person, and decides he still likes her anyway.
A Man Is Not a Virgin: Averted. He's the closest thing this cast has to a responsible, stable, well-functioning in the society adult man and he's revealed to be a virgin at the age of 30.
Primal Scene: G-rated version. His phobia of women comes from catching his father cheating with Kuranosuke's mother at a young age.
Secret Keeper: Kuranosuke's mom calls Shū to ask him to get Tsukimi's original jellyfish dress after seeing her son on TV. Naturally, Shū can't tell Kuranosuke.
Would Hit a Girl: Shu proved that if you push him too far, he will retaliate. Though, admittedly, the victim completely deserved it. He later apologizes, which throws Inari and ruins her blackmail scheme speech.
Shū and Kuranosuke's father, whose delivery is nearly always deadpan.
Heir Club for Men: The reason why he took Kuranosuke from his mom is because he was born a boy. In the chapter 63 it's revealed that Lina did plan to raise Kuranosuke on her own but realized that she's too young and that task's too big for her, and thus she gave up her son to his father. Kuranosuke still thinks that the reason was that he's a boy.
Self Induced Allergic Reaction: Breaks out in hives from eating manila clams, which he knew would happen anyway when he attempted to save Shu from Inari's advances.
Too Much Information: When Hanamori is surrounded by the "24 Ophelias" he blurts out that he's so obsessed with cars that his girlfriend left him because he loves cars more than her. Later, he lets it slip that if he's bribed with cars he'll reveal anything to anyone and at the fashion show goes into great detail that Kuranosuke is just a cross-dresser, not transsexual.
Watch the Paint Job: He really pampers those Benzes. Lucky for him, none of them have been wrecked... yet.
He's mentioned that he broke up with his own girlfriend because he preferred to spend more time with his Benzes than her.
An Indian woman who works with her brother in a sewing workshop. She agrees to help Kuranosuke and Tsukimi, though she is constantly telling them they're idiots for going into a industry they know nothing about.
But Not Too Foreign: Nisha is Indian but speaks fluent Japanese since her ex-husband was Japanese.