Shion Saotome commands authority as the eldest Saotome sister, operating under the identity Otomet Turquesa. She projects unwavering pride and arrogance, consistently asserting dominance over others. Her intense animosity focuses sharply on the Mishina sisters, with Aoi Mishina singled out as her primary object of detestation. Leading her siblings, Shion upholds her position within the family hierarchy through a personality marked by superiority and fierce competitiveness. She relentlessly seeks to outshine rivals via displays of power and calculated social maneuvers.

Her transformation into Otomet Turquesa unlocks enhanced abilities fueled by an upgraded iteration of the original Musumet technology. This power amplification specifically allows her to manipulate and overcome gravitational forces, granting significantly augmented physical strength. The turquoise designation signifies her specialized role within the Otomet framework, differentiating her capabilities from her sisters. Her actions frequently lead to direct confrontations with the Mishina sisters, cementing her role as a primary antagonist.

Hailing from the influential Saotome family, Shion is supported by their loyal butler, George. Her core motivation stems from familial pride and personal rivalry, driving her initial antagonism towards the Metropolitan Emergency Team (MET) and its members. While specific long-term development or redemption arcs remain undocumented, her interactions hint at a potential evolution from outright hostility toward a more complex, yet still deeply competitive, dynamic with the protagonists. This possible shift remains anchored in her foundational traits of assertiveness and disdain for the Mishina family, not signifying a change in allegiance or core values. Shion consistently leverages her upgraded capabilities to challenge the protagonists, maintaining pressure within the ongoing conflict.