Talk:Kishou Arima/@comment-27140447-20151111055149/@comment-10733658-20151111185241

^ True, the Garden wasn't mentioned until Hairu Ihei made the scene. But her dying flashback provides evidence that Arima is at least connected to the Garden, if not from there himself. From that flashback, we see that they were together at a young age and were wearing the same uniform. The presence of a uniform indicates an institutional setting of some sort.

We do know from JACK that he has never lived a normal life, as he states that things like going to school and talking to normal people is novel for him. We also know from this arc and Fura's statement that Arima started working at 15.