Divine Anathema - Centipede Dragon of the Whoreson - Arroyo Segundo - Leviathan Alien Creature

In the world of "Divine Anathema" everything is split into the Materia and the Immateria - the physical world and the world of ideas. People with strong bonds to ideas, "Conduits" can summon "Bridges" from the Immateria to the Materia. These "Bridges" manifest physically as a transitory realm in between and they take the shape of the bearer's inner world. Once a connection to an idea fully realizes a Leviathan carrying the spirit of the belief enters into the material realm.
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Arroyo Segundp is the "Leviathan" of a "Conduit". This "Conduit" was the illegitimate son of a crime boss and a prostitute . He had a rough upbringing as a lesser important son to his half brothers. From a young age he knew he wanted to do important things to step out of the shadow of his family. His father was eventually killed during a police raid. It left a deep impression on him and made him realize his idols can be devils in the eyes of other people. So he studied history to see what true icons of humanity are. He became obsessed with historical achievement. He believes achieving greatness to propel humanity forward is the only true purpose in life, even if it costs lives.
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This philosophy of greatness at any cost caused the leviathan of "Arroyo Segundo" to manifest.