|This article contains HEAVY spoilers. Please view at your own risk.
Rikuro is shown to be a selfish father with no real concern for his daughter's feelings. When Taiga wanted to move out, he readily agreed, showing that he didn't really want her around.
A some point, he met and married a woman, fathering Taiga. However, the two got divorced and their daughter lived with him. He eventually got remarried to a younger woman by the name of Yuu; however, Yuu and Taiga couldn't get along and eventually, Taiga told him that she wanted to move out. Rikuro, preferring his new wife over his daughter, agreed, and arranged for her to get her own apartment, providing living expenses on a monthly basis.
Eventually, he and Yuu decide to divorce and he finds it a convenient time to reconnect with Taiga.
Rikuro tries to contact Taiga for several days, but she ignores his calls. Eventually, he drains her living expenses to force her to talk to him, however, Ryuuji ends up going in her place. During the talk, Rikuro explains his and his daughter's relationship to Ryuuji, convincing the teenager that he honestly wants to reconnect with his daughter. Taiga, at the insistence of Ryuuji, does try to reconnect with him, but through a series of events, it becomes clear that Rikuro treats Taiga more like an object then family, culminating with him texting Ryuuji that he would miss Taiga's performance despite promising her that he would attend. Rikuro and Taiga seemingly stop communicating after this.
Later on, while Taiga and Ryuuji are considering eloping, Taiga mentions that Rikuro's business went bankrupt and that he left town.
- The name Rikurou means "land" (陸) (riku) and "son" (郎) (rou).
- Rikurou's surname Aisaka means "meet, greet, tryst, date, rendezvous" (逢) (ai) and "slope" (坂) (saka).