Case Closed Vol. 18 — Manga Raw / Buy Official

The transfer student turns out to be Shiho Miyano, the Organization scientist code-named "Sherry." After her sister was murdered by the group, she fled and swallowed APTX4869 — the very poison the Organization developed — shrinking like Conan and surviving as "Ai Haibara." In other words, the creator of the drug that turned Shinichi into a child and the one person who truly knows his secret arrive at once. As Gin, Vodka and the Organization's hunters close in, Conan protects Haibara, and the two become allies sharing each other's secret. Her arrival opens the possibility of an antidote to APTX4869, keeping the thin road back to Shinichi alive — a genuine branch point in the series.