Ayumi Yoshida serves as a core member of the Detective Boys, a youthful investigative team formed with her Teitan Elementary classmates Genta Kojima, Mitsuhiko Tsuburaya, and Conan Edogawa. She first befriended Conan upon his arrival in her class after his physical transformation, persuading him to join their exploration of a haunted mansion – an event that directly led to the group's creation. Ayumi developed a significant crush on Conan after his actions saved the group from criminals during a case involving stolen Italian gold coins. However, his protective behavior towards Ai Haibara led her to believe he reciprocated Haibara's feelings. Her personality blends naivety and innocence with occasional bravery and optimism, often contributing simple yet crucial observations during investigations. In "The Stranger From 10 Years Later," Ayumi appears within Shinichi Kudo's dream sequence set a decade in the future. Now approximately 17 years old and a high school student, she co-founds and leads the "Detective Club" at Teitan High alongside the other former Detective Boys members. Within this future scenario, she addresses Shinichi (appearing as his 17-year-old self) as "Conan-kun," signaling her persistent perception of him as Conan Edogawa despite his apparent age. This portrayal underscores her lasting connection to detective work and her childhood bonds, maintaining her role as a supportive and active participant in the group dynamic. This depiction of Ayumi in the OVA originates from Shinichi's subconscious imagination while he experiences a fever and experimental antidote side effects. It reveals his assumptions about the potential progression of lives around him, including Ayumi's sustained involvement with the Detective Boys into adolescence. Her appearance alongside the older Genta and Mitsuhiko emphasizes the continuity of their friendships and shared investigative pursuits within Shinichi's envisioned future. Ayumi's characterization remains consistent with her established traits, depicting her development from an elementary school student into a confident high school club leader while retaining her key identity.