Juro forced Saruta and Nekohira to run errands for him in school because he didn't want to interact with people, he didn't even remember Suzuki was his classmate. It probably prevent him from getting brainwashed.
I think the convo in page 11 is better translated as
"A Marishiten Suit that was stolen from the execution site was detected in the vicinity of the Ekoeko Tower, an apartment building directly connected to Egoda Station."
It seems Shirunin that manage to kill their Kunoichi are offered chance to become Ninja with their past of being Shirunin erased, just like Kato. It seems Igarashi also got promoted to become Bochu Jutsu lecturer but he got addicted to killing and after killing several Kunoichis and civilians he...