Was researching rejuvenation drugs he called the "Barbara Series" at Jojo Pharmaceuticals. Married Nanami; they later divorced. Prophesized about Mars before disappearing without a trace.

Spoiler

As Johannes Sera he was a priest. Head of the "Green Noah-Barbara Project," which intends to make the Earth greener, and the founder of an orphanage. As Doctor Azzurro, he lived as a political refugee from Greece to Switzerland, researched aging in isolation for years and supposedly suffers from a progressive memory disorder.