Detective Conan: Ai Haibara

Ai Haibara, real name Shiho Miyano, is the creator of APTX 4869, the pill that shrunk Shinichi Kudo into Conan Edogawa, and a victim of it herself. Formerly of the Black Organization, she is on the run from them and lives with Professor Agasa. She is also one of the few characters who know that Shinichi is Conan.