SPOILER#2

Louis in the CORE world is "something" that has information about Louis.

His purpose is to take Allen to the afterlife. And afterwards... Allen's fate depends on his mood.

He hates Campanella and sees her as an enemy. And he tells Allen that Campanella is dangerous so that Allen will not be taken away from him.

He may have broken through the fourth wall. As he is, he will eventually acquire new abilities and this article will eventually be overwritten^^