원죄
is the ruler of Solaris. Created along with the Gazel Ministry and Miang, his role was to also serve in the resurrection of Deus. When Abel and Elly fight against Cain's plans for resurrecting Deus, it was Cain that plotted the death of Abel, an allusion to Original sin. Although he is supposed to aid Deus, as a leader of Solaris, Cain actually believes in making the lives of the humans better. He becomes at odds with the Gazel Ministry when they want to use the Gaetia Key and is eventually assassinated by Ramsus under Krelian's orders.