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.
Momo getting the most points in the match against the vice-captain of Kazekoshi, Touka, and Nodoka. And all this from a character whose face had never been shown until halfway through the match.
Saki defeating Koromo by getting a Rinshan Kaihou, as well as taking advantage of a rule that forces Koromo to pay the points, which enables Saki to overtake her and win.