Schroedinger

A mysterious being that manifested itself as a black cat with one white ear and a pair of bells that resemble Seraph's "Clarion" Atma. He watched over the Embryon from the very start in the Junkyard, although he never revealed himself as friend or foe. He later reveals himself to Serph in the EGG Chamber to show him the past of Serph Sheffield, the man on whom AI Serph was based. He reappears in the sun to guide Seraph to enlightenment.

It is finally revealed to the enlightened [Seraph]] that Schröedinger is also a higher being. Whether Schröedinger is also a being who attained enlightenment, an avatar of God Himself, or a facet of the ascended Seraph is never clarified. Together, Schröedinger and Seraph leave to travel to different worlds and realities.

His name is based on the paradox of Schrödinger's cat. Schröedinger was also the name of the cat that Heat O'Brien gave the young Sera as a present.