These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Kana gets several of these, namely when she gets a Yakuman hand earlier than she expected and passes it up solely because it interferes with her gameplan of getting 30 exhaustive draws in a row and one direct yakuman in order to win. And she seriously believes she can do it.
Despite having only two appearances in both the Anime & Manga, with only an onomatopoeia to her credit in terms of dialogue so far, Awai became so ridiculously popular with the fanbase that she actually gained a berth in Sai Moe 2010.
Kamigaki was only in the pre-prefecture round and, to be fair, had none of Awai's design that warrant anything, and frankly was not that popular with Western fans, but she did manage to get into Sai Moe 2009.
Fridge Brilliance: Momo's childish speech isn't her trying to be cutesy; rather, her speech never matured because she stopped communicating when she was a child.
There are also jokes that the series is set in an alternate universe where not only is mahjong extremely popular, but also panties were never invented.
Memetic Sex Goddess: In fandom, Hisa is universally regarded as a Pimp who can win the affections of her opponents with relative ease, given her stunningly good looks and incredibly charming demeanor. (Given her Les Yay moments with Mako, Mihoko, Yumi, and Haru. Heck, even NODOKA has had a moment with her.
The Woobie: Saki qualifies, given how frail and delicate she is. She really shines, however, in any scene regarding her older sister (Or whenever she gets lost.)
Momo is in this ballpark as well. She's gotten so used to being ignored that she's invisible because of it, but all she wants is one person to notice her. D'awww...
