Talk:Ken Kaneki/@comment-95.60.47.216-20150617023408/@comment-25047329-20150617135524

Arima is Sasaki's mentor, but he already seems mostly trained up (to the point he has his own squad even), so if we see them fight together, I think the most likely chances are in a flashback. We still haven't seen Sasaki's "past" (between being captured and the start of :re) which is where I suspect we'll get the most development on his and Arima's relationship. Sasaki being the highly dangerous and unstable ghoul he was, I imagine he accompanied Arima on a few "test run" missions to see if he was really usable as an investigator.