(Alexis Rhodes in NA localisation) is an Obelisk Blue student at Duel Academy who quickly takes interest in Judai's talent. Later, it is also revealed that she loves Judai. She duels using a Cyber Girl deck. Judai accepted a duel with another player, and whomever won was to be engaged to Asuka, Judai won but in the end had no idea what fiancee meant so Asuka responded "It means friends. At least for now, big guy." She also knows that Jun has a crush on her.
In the timeline of the Yu-Gi-Oh! GX anime, Asuka, residing in the Obelisk Blue dormitory along with Marufuji Ryou and initially Manjoume Jun, is one of the top students at Duel Academy. She does not follow the crowd nor does she regard herself as better than other people like some students in the dormitory, but has a stern pride as an Obelisk Blue duelist.