Talk:Kishou Arima/@comment-25954030-20150228220817/@comment-10733658-20150306122537

From Tokyo Ghoul: Jack, we know a little about Arima's early years as an Investigator. He mentions that they send him from Ward to Ward, doing undercover work or otherwise taking on dangerous solo missions. That was two years before the Owl appeared.

We're also told that Aogiri sprang up within the decade between the Owl's appearance and the main series. Most of the founding members came from either the 24th or 13th Wards.