Ryō Sawatari lives with his wife Haruka and their son Yuma at the Asagaya Apartments in 2049. His demanding job frequently keeps him away until late at night. Despite this, he demonstrates a quiet dedication to his family, prioritizing them during critical moments.

He shares a longstanding connection with Yoshitatsu Kawai, father of Honoka Kawai, as both men are Haruka's childhood friends. History reveals Ryō and Yoshitatsu both harbored romantic feelings for Haruka in their youth.

At home, Ryō observes the strained dynamic between Yuma and the household Autobot Nanako, choosing to monitor their interactions from a distance rather than intervene directly. Haruka relies on Nanako to manage domestic duties, especially during her night shifts. While Yuma resists the AI, Ryō supports this arrangement, recognizing Nanako's role in maintaining household stability. His character consistently balances significant work responsibilities with familial obligations, emphasizing reliability in pivotal situations affecting his household.