Talk:Ken Kaneki/@comment-121.96.57.140-20150419061550/@comment-25047329-20150419195053

@   Valyriefaery

Oh okay. XD

"Necessary evil" is just a figure of speech, it's not literal. What it means is that something bad has to happen in order for something good to happen. Like let's say you're stuck in a hostage situation and you have an opportunity to shoot and kill the perpetrator to save yours and other people's lives. That's a "necessary evil".

In the case of Sasaki the "necessary evil" is having to retrieve his memories and having to suffer through the bad ones-the torture, the family issues, the shame of feeling that he couldn't protect everyone, etc, in order for him to deal with his issues. Probably other concequences as well like the CCG marking him as a threat.