So Minori disappeared for a short amount of time when she entered Goldy, probably a few minutes? I wonder if time moves faster inside the mind. This is important because on the outside world Held just kind of flopped over when Minori entered her mind. I wonder if here dad is Not Happy about whats going on.

Will this be what turns Minori into Ciel, or whatever weird entity they are?

@Zalander
That's an easy answer. They are not real, they are characters in a comic strip. But so are you.