She is Akagi Gaju's younger sister as well as his dance partner. They have been dancing together since she was four years old, with her being the one who initiated the pair's entry into the dance world. She thinks herself as somewhat unworthy of her brother's partnership, at first, but after competing with Fujita at the Tenpei-cup (and placing seventh) she becomes more confident and comfortable with herself. Mako's relationship with her brother also improves after the events of the competition.
Despite coming last, at the Tenpei-cup, Mako beats Shizuku and wins the Queen of the Ballroom trophy.
It is hinted that she might have developed a crush on Fujita, after they danced together at the Tenpei-cup. However, nothing has been confirmed.