There are some people can no longer be considered human . And I mean that in the worst way possible . They should be publicly humiliated and tortured in the streets and put down without remorse . Locking them up will do nothing . <| sep |> Like last week they made the rates better <| sep |> I disagree . There ' s no proof that any of these Pure Illusion worlds have to be based on a person . Going by the theory that PI is a world created by the human subconscious they briefly showed a scene of a painting . Cocona had seen this world before in a painting made by Iro , which is why she later said that she has something precious to protect as well and vowed to defend the city . As for why Buchan died , I ' m pretty sure they landed on him in the pool before they disappeared , the holes to PI so far have been just that , holes . However we see a large could of smokeoil in the pool where they landed and where we know Buchan was hiding .