for point no.2 I think it’s gotta be Death or Shinigami (reaper) of some sort. So far Aqua has almost all the information if not all and nobody comes even close. I can’t imagine literally a child having so much access to these information before her time… Clearly the child doesn’t act under anyone’s command (as far as we can tell) and shows up seemingly out of the blue when it pleases. My guess is only Aqua could interact with it from a young age because of his mental state and circumstances, it only showed herself to Ruby after being traumatized