Ryoko works as a maid for an affluent household, enduring persistent physical and emotional abuse from her employers that defines her as a victim of cruelty. Despite this suffering, she consistently maintains a pleasant outward demeanor, presenting a smiling facade that masks her inner pain and resignation, exhibiting traits of a Stepford Smiler. Her interactions with the protagonist, Onikirimaru, reveal moments of unexpected kindness as he shows compassion towards her situation, contrasting sharply with the harshness she typically faces. This dynamic underscores a thematic parallel between them, emphasizing their shared experiences of alienation and suffering.

Ryoko's narrative arc concludes tragically. She embodies the trope Too Good for This Sinful Earth, her inherent goodness portrayed as incompatible with the brutal world she inhabits. The series' story structure frequently employs Bitter Sweet Endings where few characters survive; Ryoko ultimately meets her demise as part of this recurring pattern. She does not appear in other media beyond the original OVA episodes.