Ami Kuroki is a student at Waldstein Academy and a close friend and classmate of Maya Kumashiro and Kozue, having grown up alongside Maya since childhood. Her physical appearance is characterized by short, cropped hair. She has a deep familiarity with Maya's personal history, including the strained relationship her friend’s family has with the occult.

In terms of personality, Ami initially presents as reserved and quiet, but as the story progresses, she reveals a more cheerful and playful side. She is highly intuitive, possessing a notable and almost innate ability to sense supernatural phenomena that others cannot perceive. This natural gift makes her a valuable asset when investigating paranormal events. Beyond her intuition, she demonstrates strong independence and determination, showing a willingness to follow her own judgment and act on her own terms rather than simply playing a supporting role.

Ami's motivations are closely tied to her friendships and her curiosity. She is driven by a desire for new experiences and a fear of being constrained or limited, which aligns with her spontaneous and adventure-seeking nature. Her encounter with the occult and her involvement in the central mysteries are heavily influenced by her long-standing connection to Maya. She is introspective and self-aware, constantly striving for personal growth and deeper connections with those around her. Ami values authenticity and honesty, and she dislikes pretense and conflict.

Throughout her journey, she serves as an integral part of the investigation team, using her keen senses and sharp intellect to help solve puzzles. While she is often energetic and easily excited, which can sometimes lead to a lack of focus, she remains deeply passionate about her interests and is resourceful when pursuing her goals. Her development showcases a balance between her carefree, fun-loving impulses and her serious, insightful capabilities, ultimately making her a complex and dynamic presence within the group.