A 17-year-old high school student originally from Kyoto, now attending a prestigious prep school in Tokyo. She is a self-made hard worker who earns her own living and tuition. Known as a superhuman honor student who excels in academics, sports, and music, she pushes herself to the limit, sacrificing her health through chronic sleep deprivation and extreme frugality. In the virtual space "Tsukuyomi," she is a devoted fan of Yachiyo Tsukimi. She also works behind the scenes as "Iro-P," composing and arranging music, and earns pocket money in the battle game "KASSEN." Appearance She has long, straight black hair tied to the right, with loose strands adding a soft touch to her intellectual features. A beauty mark under her left eye is a striking feature, and her clear dark brown eyes always reflect a serious and strong will. She is a beautiful girl of both talent and grace. Her khaki-based sailor uniform gives a neat and serious impression, and she is often seen carrying her school bag like a backpack. Her private clothes are mostly functional casual wear, though she sometimes makes "old man" faces when exhausted. Her Tsukuyomi avatar is a mix of Japanese and Western styles, featuring fox ears, a fox tail, a kimono, and a hoodie, with red decorations on the forehead for a cool, androgynous look. Personality Serious and responsible, she is a pillar of independence who tries to solve everything herself. A hard worker who gives her all even at the cost of sleep, she is a "superhuman" type, but her lifestyle of living on pancakes made of just flour and water and relying on energy drinks is dangerously unhealthy. She is a softie who can't refuse requests, often teased as "Choro-ha" (Easy-ha) by Kaguya. Usually calm and somewhat cynical ("I don't need a happy ending, a normal one is fine"), she is a closet otaku who spaces out in a girlish pose when moved by Yachiyo's streams. A loyal friend who can't leave someone in trouble, she plays the role of the partner who provides sharp retorts to Kaguya's wild antics. Hobbies Her biggest hobby is supporting Yachiyo Tsukimi. She follows the streams and collects limited-edition goods with her limited savings, using them as emotional support. She is deeply involved in music, having played piano since childhood and excelling at composing and arranging using a DAW, though she doesn't do so publicly now. Gaming is also a hobby; in KASSEN, she is an advanced player who fights with dual blades modeled after keyboards (with piano wires) and a black hawk mount. While earning a bit of pocket money, she also enjoys producing Kaguya's streams. She relieves stress through reading and jogging, and inventing frugal recipes is a daily hobby. Speech Style She primarily speaks in standard Japanese, being polite and logical. She prefers a formal "desu/masu" style and speaks with the composure of an intellectual honor student. Her speech is characterized by an explanatory tone that accurately analyzes situations. When reacting to Kaguya's outrageousness, she speaks faster, using a sharper yet friendly tone like "Wait a minute! What do you mean by that!?" Being from Kyoto, when she gets emotional, relaxed, or is with family and close friends, her natural Kyoto dialect slips out. Soft and cute nuances like "-yawa," "-hen," and "-dosue" appear, creating a charming gap with her cool appearance. Overall, her speech coexists with adult-like composure and natural friendliness.