Tsuki possesses long green hair and vivid emerald eyes, her appearance accentuated by crisp white attire, sleek gray high heels, square-framed glasses, and understated earrings. Her demeanor shifts between poised politeness and detached bluntness, revealing a duality that keeps others guessing. As a sharp-witted researcher at Lacuna Chemicals, she hones her analytical prowess and keen observational insight to aid her team in confronting mysteries tied to the enigmatic disappearance of Lost City.

Though guarded, fragments of her past surface subtly, informing her calculated decisions and quiet motivations. Gradually, she forges pivotal connections with allies like Yuki and Takuya, balancing intellectual mentorship with moments of unexpected empathy during their perilous journey. Her strategic mind and perceptiveness prove vital to the group’s survival, yet her introverted nature sometimes casts an unspoken chill, leaving camaraderie just out of reach.