About Atsushi Miyano
Atsushi Miyano (宮野 厚司 Miyano Atsushi) was a biochemist in the Black Organization and apparently Shiho Miyano and Akemi Miyano's father. Atsushi Miyano and Elena Miyano started or continued on the APTX 4869 research according to Vermouth. One or both of them worked on the project before Shiho Miyano took over.