User blog comment:JacobKyleF/Critical Review Proposal: Kai Chisaki (Overhaul)/@comment-24097388-20200109192028/@comment-44269583-20200111105130

When i mean "understand the correct criteria", i mean i want everyone in the community to understand and study the process of Kai's character so far.

If you read the manga and some of its scenes on chapters were not that convincing to Kai's character, then it's futile, the criticism received from Kai's PE Proposals that failed three times is futile and absurd, sorry if i'm being critical on the users who criticized their reasons towards kai. But it was kinda true from detail.

but in Anime version. It's really convincing to me already. In the latest Episode of Season 4, it's finally confirmed that Kai did put his Boss under a Coma off-screen and showed no regret.

Also, after The boss tells Kai his plan is going too far as he heard that Kai will use Eri as part of it. but as the Boss told Kai, "Eri is a person, doesn't that matter to you". After the boss has had enough of Hearing Kai's Plan.

Kai refuses to accept The Boss' disagreement, therefore the boss is concerned for Eri. Which leaves Kai to finally lose his human side and uses his debt for the Boss' kindness into his own motivation, causing him to be more obsessive. As Kai finally put the boss under a coma and taking control of the Hassaikai.