Aoi Housen

Aoi Housen is a fictional character in Infinite Ryvius (movie and manga).

Aoi Housen is 16 years of age and a childhood friend to Kouji, Aoi has known the Aiba brothers longer than anyone outside the Aiba family and acts as an older sister to both boys, often going out of her way to check up on them. A flight attendant trainee aboard the Liebe Delta, Aoi often sticks her nose into Kouji's business, but only because he is weak and spineless and not because she has any special feelings for him. Outside of her dealings with the Aibas, Aoi is fast friends with her fellow flight attendant Kozue Izumi. (Seiyuu: Houko Kuwashima)

It is soon apparent that Aoi harbours feelings for both the Aiba brothers. However, building on her relationships with the boys was impeded. By the time Aoi realized what her feelings were, Kouji was pursuing a relationship with his own crush, Fina S. Shinozaki, and Yuki's attitude made it impossible for any save the most foolish or most persistent to get close to him. By the end of the series, all relationships and emotions are resolved, and Kouji and Aoi return to the Ryvius as an official couple.