Inki is a fair-skinned oni possessing a single horn, striking purple eyes, and long lilac hair that deliberately obscures the left side of her face. Her characteristic attire includes a long black trench coat fastened with silver buttons, sleeves long enough to cover her hands, small black ankle boots, and a visible devil tail, reflecting her shy demeanor. She exhibits a reserved and anxious personality, frequently speaking in a soft voice marked by a stutter and leaning heavily on her friend Youki to communicate for her. Despite this profound shyness, she demonstrates maturity by consistently prioritizing her friendship with Youki and deeply respecting their bond, even when it initially meant sacrificing her own path. She treasures her relationships with both Youki and Princess Hime, actively joining them in group activities like theme park visits, picnics, and beach outings. A competitive spark emerges during video games, where she excels, contrasting sharply with her physical clumsiness—evident when she was the first eliminated in a beach sword-fighting game. Motivated by a desire to make others happy, Inki decided during high school to join the Hellhorde as a torturer. This career choice crucially allowed her to maintain her close bond with Youki, who joined alongside her. They initially served as intermediate-level torturers ("lieutorments"), specializing in unique friendship-based interrogation methods centered around bonding activities rather than traditional coercion. She undergoes significant professional growth when she and Youki attempt the promotion exam to become "harm-marshals" (advanced torturers). After failing their initial attempt to extract secrets from the Hell-Lord through dancing, they seek advice from Princess Hime. Following Hime’s suggestion, they incorporate the Hell-Lord’s daughter, Maomao, into their routine. This strategy successfully melts the Hell-Lord’s heart, earning them their promotion and highlighting Inki's adaptability and commitment to her role. Her personal preferences include enjoying time with Youki and Hime, visiting theme parks, and finding deep fulfillment in her job. She dislikes being flustered, having her promotions rejected, or unduly influencing Youki’s decisions. She maintains a close familial bond with her brother, Insuke, who appears during group outings. Throughout her experiences, Inki evolves from a hesitant individual into a more confident torturer while steadfastly retaining her core traits of thoughtfulness and loyalty. Her development emphasizes strengthening friendships and finding purpose in her work without ever compromising her cherished relationships.