Hoshimi Miyabi is classified as a Thiren, specifically a fox-type variant. This classification is visually evident through her long, upward-slanting triangular ears, which resemble those of a fox in both shape and orientation. These ears are a hereditary trait within the Hoshimi family, serving as a consistent physical marker among its members. Miyabi's height is officially listed as 170 cm (approximately 5 feet 7 ), including her ears. However, no official measurement has been provided for her height, excluding the ears.

 Miyabi's design features a long black skirt paired with a formal teal and white shirt and a tie. Notably, her left arm is not organic; it is a robotic arm that she uses just like a regular one. She also wears a black belt adorned with a hand design on the front. Her overall attire reflects a professional and restrained aesthetic, which is consistent with her disciplined persona, her organizational role in the game’s setting, and her position as the chief of Hollow Special Operations Section 6.