♡;

ㅤAsuka first appears when Hazuki Katou, Kumiko Oumae and Sapphire Kawashima enter the band room for the first time, where they see many students and Asuka herself playing music. After chatting a little, Asuka approaches them and surprises Hazuki with a kissing face, making Hazuki trip and fall in shock. Then, Asuka opens the door and asks if they are coming to visit. After Asuka introduces herself properly, Hazuki decides that Asuka is very beautiful.

During the first level of competition, Asuka appears downcast onstage and post-performance due to her knowing that her mother will not allow her to compete in the nationals, unknown to her peers.

In the first time half of the second season and in the second light novel, Asuka learns that her father, whom she has not seen since she was very young, will be judging the final round of the competition. Now that she has the determination from her father to continue striving to perform, Asuka begins to behave in extreme ways. The most notable instance of this is when she tries strongly to forbid Nozomi Kasaki from rejoining the band, fearing that the sour relationship between Nozomi and Mizore Yoroizuka, a player in the band's musical success, will affect Mizore's performance ability.

In the second half of the second season and in the third light novel, Asuka is forced by her mother to quit the band but eventually manages to return in time for the final competition, at which she receives the first contact from her father in many years.