Asuka has a tomboyish personality and is quite brash and arrogant. Although her profile states that she breaks up fights regularly, she seems to have no qualms about fighting and seemingly revels in it. In her story mode, after defeating her target, Feng Wei, she decides to remain in the tournament in order to "have fun". Her pre and post-match quotes also demonstrate her confidence. As stated in her Tekken 5 / Dark Resurrection prologue, Asuka is also known as being a "nosy kid" who likes to solve other people's problems, "usually by knockout". According to her Tag 2 ending, she often goes around looking for gang fights to stop in Shinsekai, which is known as Osaka's most dangerous neighborhood.
Asuka speaks in Kansai dialect (Kansai is a region of western Japan encompassing major cities such as Kyoto, Osaka, and Kobe).
Asuka is somehow related to Jun Kazama (Jin's mother) and is the rival of Emilie "Lili" De Rochefort.