Insecurity and a sense of superiority over his self worth as "the strongest." Because he doesn't want to focus on what strength can be, other than destructive violence.
Didn't he say that the tax is only applied when you want to use the stones but not mention if you trade them in?
I might have missed it or I'm hallucinating.
Are you reading the raws ahead of the translations and wanting to spoil the speculation happening in the comments?
Cause her behaviour isn't genetics alone, as it's more of a combination of genetics and environment. Also, if nothing happened to her right eye, then why does the cover art show...