Talk:Katsushika Hokusai/@comment-11147564-20180101092114/@comment-2602:304:CE86:590:C429:9D6C:9ED3:35F3-20180101103457

according to BB, the requirement for class Foreigner's qualified by those who didn't lose purity while losing sanity or who had affinity toward the matter that cause insanity and took the insanity in themselves.

Abigail's the former, who was capable of staying pure even after going insane, and Hokusai(the father) was latter, who had affinity toward the insanity and became what he is now. Octopus.