Princesa Ogin, also known as Tamashiro or Ginmei, acts as a subordinate to the antagonist Unkokusai. Originally created as a doll, Unkokusai transformed her into human form. She possesses a conventionally attractive appearance marked by distinct evil-looking features: black hair, fair skin, and blue eyes. Her abilities include wielding a mysterious force that transforms targets into small spheres, exemplified when she turns Hiroshi and Misae Nohara into balls after Misae angers her. Ogin exhibits fierce loyalty to Unkokusai coupled with notable misogyny, particularly directed at women who interfere with or challenge him, despite her own gender identity. She reacts with quick anger when others disrupt Unkokusai's plans or attract his attention. During a confrontation, she physically assaults Fubukimaru by pulling her hair. Fubukimaru counters by stabbing her with a dagger, prompting Ogin to retaliate with paralyzing green smoke that immobilizes Fubukimaru. This conflict ultimately leads to Ogin's destruction at Fubukimaru's hands. Her narrative role involves participating in theft operations, such as stealing Misae Nohara's waist pouch containing important personal items, an act that motivates the Nohara family's pursuit of Unkokusai's forces. She also actively engages in combat against protagonists during their mission to infiltrate Unkokusai's castle.