Tsukiyo-hime presents as a young woman bearing pointed elf ears and a traditional demeanor, typically clad in traditional Japanese attire. She maintains a tranquil, mysterious presence, rarely engaging directly with others or participating in standard activities at Shinobi Gakuen. Unlike her peers, she resides in a nearby forest, reflecting a deep-rooted connection to nature and a lifestyle aligned with traditional customs.

Her appearances are infrequent and unexpected, often occurring in unlikely locations such as restricted temple grounds, remote mountain peaks, or isolated natural settings. During these encounters, she is frequently observed consuming miso soup. This soup serves a purpose extending beyond mere sustenance; it functions as a medium enabling her to perceive and display events occurring elsewhere. Through it, she provides guidance or cryptic insights to those she encounters, sharing relevant visions or reflections of distant happenings.

She maintains distance from direct involvement in others' affairs, preferring an observational role. Her counsel typically arrives as calm, unelaborated philosophical statements or indirect wisdom. No significant alterations to her background, personal history, or role are documented across the series' two seasons or related media. Her origins, motivations, and personal development remain undefined within the available information.