Shiho Miyano is a former member of the Black Organization under the code name Sherry. A gifted chemist at a young age, she is the inventor of APTX 4869, the poison that shrank Jimmy Kudo. Both her parents and sister, Akemi Miyano, also worked for the organization. Shiho betrays the organization after Gin killed her sister. She took the drug in a suicide attempt, but rather than dying, she, like Jimmy, became small. When she was 18, she escaped the organization and went into hiding. She is taken in by Dr. Agasa and is given the alias Anita Hailey: known as Ai Haibara in the original Japanese version

I want for her to have a deadpan sort of voice, she should sound serious most of the time, but she also jokes sometimes