Sorry, the world isn't roses and cotton candy.
But then again, we have a cheerful, talking skeleton that can apparently crap.
Great way to introduce the Florian Triangle Arc.
I wouldn't mind if Brooke stayed as a full-member, however I believe that he is only a temporary companion. If skeletons are immortal and could roam the world, then the whole world would be covered in them. I figure the Florian Triangle handles the supernatural/undead; and thats partially why I see Brooke staying behind rather than remaining.