Midori Ōmori emerges as a central figure in the *Escalation* trilogy, a self-contained miniseries within a broader anthology. A student at a private Catholic institution, she occupies dual roles as Naomi Hayakawa’s devoted girlfriend and submissive companion, consistently addressing her with the reverential *"oneesama."* Her aloof, critical exterior conceals a sharp, methodical mind driven by precise calculation. Tasked with supporting Naomi’s manipulative pursuits, Midori acts as both strategist and enforcer, securing alliances with students like Rie Komatsuzaki, Mari Kudo, and Arisa Kurimoto to bolster Naomi’s influence. While unwavering in her loyalty to Naomi, subtle deviations in her behavior—such as covertly guiding Rie through an algebra problem—reveal dormant intellect and an unexpected emotional tether to Rie. Her bisexuality intertwines with a history of transactional encounters, including an implied liaison with Naomi’s father, complicating her otherwise singular dedication to Naomi’s authority. Post-graduation, she remains entrenched in Naomi’s orchestrated schemes, perpetuating their dynamic at a secluded villa. An alternate iteration of Midori appears in a visual novel reboot, preserving her name but recontextualizing her role within a divergent narrative framework. Her familial background, external connections, and personal evolution beyond the trilogy’s central relationships remain unexplored.