That man's name was Richter Snow.
His history wasn't anything significant. He started as an ordinary person who wanted to become strong, and along the way, he developed a sort of obsession with "that which should not exist."
However, his view of that concept was different than most others who sought the same knowledge. Rather than the ethereal forces that qualified under the umbrella, he focused on existences.
His pursuit took him to the Nox first, and when he wasn't able to remain in the lower universe any longer, it led him further to beings he had no business being involved with.
That was why he never made contact with those beings. He knew he didn't stand a single chance against them. He couldn't abuse them, because they didn't have the same limitations that the Nox Race possessed.
