Yumina Takanashi is a petite young woman with a slim frame, standing precisely at 149.9 cm, her pale complexion and youthful features accentuated by short blue hair styled with spiky, center-parted bangs. Her amber eyes, slightly downturned, convey a gentle demeanor. She frequently dons a police officer uniform, accessorized with an armband, a delicate hairpin, and sheer pantyhose, while clutching a notebook essential to her duties.

As the non-biological stepsister of Yuri Mito, she resided with his family until his mother’s passing. Despite lacking blood ties, she idolizes him, diligently managing household tasks like cooking and chores. A top graduate from Sosei Academy’s all-girls division, she earned peer-elected leadership as chief representative before transferring to the elite Flawless department. There, her reserved, introverted nature slowly transforms as she confronts academic and social challenges.

Supernaturally entwined with Hou, a frail avian Tayutai that perches atop her head, she gains wings after merging with the creature during a clash against Oryu, another Tayutai. Her empathetic interference bridges the rift between Hou and Oryu, cementing her as a peacemaker. Prone to anxious outbursts under stress, she nonetheless exhibits tenacity in safeguarding others and fostering coexistence between humans and Tayutai.

Initially hesitant and prone to third-person speech, she gradually sheds her social anxiety, engaging directly in conflict resolution. In spin-offs like *Tayutama 2*, she appears as a steadfast side character, upholding her core traits of meticulousness and a fiercely protective spirit.