Hair Decorations: Yaya wears a black butterfly-tie accessory on her left side, contrasting the pinkish-white ribbon of Tami. In another contrast, Naru usually wears a pair of hairpins with smallish yellow stars that serve no practical purpose (such as to hold the potential bangs or something) as apparent from when she's seen not wearing those. Casual wears often call for different decorations.
Sailor Fuku: Employed as uniform in the all-girls school the cast attends.
Second Year Protagonist: Naru, Yaya, and Hana are all classmates in their second year of middle school (not high school). Machi and Tami are a year ahead ("sempai") of them.
Unlimited Wardrobe: While the school appearance is maintained the same, it's not the sole look heroines can have. For just a few examples, in episode 2, on a day off Hana wears a jacket, shorts and no tights and Naru wears a hoodie, long pants and a different pair of hairpins. Yaya is at her part-time job dressed appropriately, her hair in a ponytail and side tails. And when Hana and Naru practise yosakoi outside (and are found by Tami, in third episode of anime), they wear yet again different casual clothes.
Wingding Eyes: When things get superficially emotional, ">_<"-faces and such can be expected.
Girlish Pigtails: Naru usually ties back most of her moderate length hair in two pigtails. They turn out short, but still, before the two are proper introduced, Hana calls for Naru by using "Osage-san" (approx. "Miss Pigtails").
Shrinking Violet: Early on, Naru feels empty, inferior to her favorite sparkling heroines of fairy tales. She also gets distressed over weird rumors about herself caused by the ruckus of Hana's insistent invitations. Even as she succeeds at forcibly pushing the yosakoi-freak away, an accent is made on how Naru has just had a reaction to other people watching the confrontation. After some time, she can't help confiding in Hana how good it felt when they danced briefly before, thus kicking the "graduation from Shrinking Violet" plot line into full gear.
A-Cup Angst: She is apparently a little insecure about how she's comparatively undeveloped compared to her schoolmates, never mind the fact that she's an American, and everyone else expects her to be tall and stacked. Yaya uses this fact to poke fun at her, when the former makes Hana wear her brother's clothes.
Hana (over an image of an older and G-cupped version of herself in a bikini): I'm going to look like this when I grow up!
Charles Atlas Superpower: It's hard to believe that Hana is "merely" incredibly athletic, given what she's been shown to accomplish during the first episode/introductory chapter alone: vertically jump more than four times her height (on platform geta sandals at that!), balance perfectly on precarious surfaces, or quietly appear in unexpected places. It's for these reasons (and the fact that she's apparently very pretty) that Naru mistook her for a fairy when they first met.
No Sense of Personal Space: Tends to get very close to some of the characters at times. This was one reason Naru was uncomfortable with her early on.
Occidental Otaku: It turns out that Hana is a yosakoi dance nut, and one of the main reasons she came to Japan was to learn more about it. Her earnesty is not complemented by systematic approach though. Yosakoi shop owner was the one to teach her proper way to flick naruko. She's not good at using chopsticks either (shown when eating soba at Yaya's shop).
Older Than They Look: Hana happens to be around the same age as Naru, yet she's much shorter than her.
Le Parkour: She practiced it (referred as "free running") previously.
Proper Tights with a Skirt: Of the ensemble of girls, Hana is the only one who wears tights with her school uniform. She's also the shorty.
Phenotype Stereotype: Zigzagged. She fits the minimum requirements for this trope for blonde and blue-eyed, but nothing more than that. Her body is in fact the least developed among the main cast.
Spell My Name with an "S": Is it Hana or Hannah? While the former spelling makes sense, given the flower theme the series has, the latter seems more likely for a Westerner to have. Crunchyroll and the French release of the manga use the former, while fan translators of the manga have so far been undecided, and have actually used both for different chapters.
Clingy Jealous Girl: She doesn't seem to like how friendly Hana is towards Naru. So much so that it affects her band practice, and she even tries to stop Naru from hanging out with Hana, telling her that they're not going to get anything done.
Sweet Tooth: She sure loves her sweets. In episode 8, sweets of various kinds are lined up in front of her!
"Well Done, Son!" Guy: Everything she did up to doing Yosakoi, from ballet to piano lessons to tea ceremony and flower arranging, was to make her father proud of her by acting like the perfect ojou-san.
Yamato Nadeshiko: Tami fits this to a tee, being a well-mannered girl brought up in a traditional and affluent family, and to top it off, she wears a traditional kimono when out of school. Hana even calls her as such.
Broken Pedestal: When she was younger, she greatly admired her big sister, Sally, and wanted to be just like her. After Sally walked out on her family, Machi grew to resent her. After learning why Sally had left in the first place(Sally wanted to become a teacher, but her parents didn't agree with her career path), her hatred for Sally vanished.
Defrosting Ice Queen: She becomes much less hostile to Hana and the others after her issue with her sister is resolved.
Freudian Excuse: Her acting in a very strict manner stems from her older sister originally be a person she looked up to. Until one day she just decided to leave the house, and angrily slaps away a test Machi scored a perfect 100 on and wanted to show her. Consequently, when her sister shows up later, Machi is understandably hostile towards her, and feels Sally-sensei is going to abandon the Yosakoi club whenever she gets bored with it. It takes Tami telling her about how her sister was still looking out for her, and that she came to this school specifically because Machi was there even though there was only a substitute teacher position. She also tells Machi that Sally-sensei took an exam that would certify her to work full time as a teacher.
Meganekko: Gives a reason for Hana to call her out on being a case of "gap moe".
Obstructive Bureaucrat: Performs this function early on. She at first denies Hana and Naru use of the school rooftop to practice yosakoi dancing since they weren't an official club. Later on she tells them they need a full time teacher to be their advisor, and as Sally-sensei was only a substitute, she wasn't technically eligible to do this.
Student Council President: With a dash of Obstructive Bureaucrat thrown into the mix, given the extreme measures she drops on Naru and Hana.
Sugar-and-Ice Personality: She's stern, but her interactions with Tami show that she has a softer side. Said softer side becomes more prominent after she joins the Yosakoi Club in episode 10.
The Ace: Back in her high school days, she was known to be well gifted in academics and sports.
Cool Big Sis: Towards the Yosakoi Club members, and a literal one towards Machi before she left her family and after they reconcile with each other.
Sensei-chan: She hits most of the check boxes for this, what with being a new graduate barely out of college, who's more worried about still being eligible for marriage rather than the grunt work required for being a teacher. Hana even calls her "Sally-chan-sensei".