Sasaki was not brainwashed, he has a traumatic brain injury.
Recently, I’ve been reading that many people think Sasaki was brainwashed by the CCG. However, being the Bio major I am, I felt the need to post something about it in a more medical perspective.
So, we all know how Kaneki met his end, and that was at the hands or more so lance of Arima Kishou. When Kaneki was stabbed through both eyes, there is not a doubt in my mind that Kaneki suffered from a brain injury.
In fact, that lance could have hit his amygdala which has proven to cause drastic shifts in behavior.
Now, many of you might be like: Lex, he’s a ghoul, he can heal!
Yes, I know. But if you think about it, a quinque has the same properties as kagune. Which means scarring would most likely occur.
With this, I move onto my next point:
Sasaki’s brain has scars from where Arima stabbed through it. This would cause pieces of the brain to also be lost, which also could mean that if his brain reformed it would be missing those specific functions and perhaps if it hit the part that is responsible for memories, would also cause horrific amnesia. Regardless of hitting that area, Sasaki’s brain was damaged in such a way where he has amnesia.
Another symptom is having migraines and headaches which cause extremely severe pain in some cases to the eyes. Remember how he was holding his eye in the bathroom? It also could be because it was where he was stabbed.
Then, there are the memories that begin to surface which causes extreme discomfort because of the fact that you don’t know what those memories relate to. Usually, they appear like flashbacks and that would cause an EXTREME amount of stress.
So, in all honesty, I believe that Sasaki has a traumatic brain injury and was not brainwashed.