User blog comment:PUNCHURPREGNANT/Gray and Silver Predictions/@comment-3424593-20131226212258

the theory I like the most is of Silver having always been a demon and then fell in love with a human. they had a baby boy who they named Gray because, you know, Silver. he then cheated on grays mom and fucked ur and had a daughter who they named ultear because, you know, Ur.

so gray and ultear are half siblings. :)

because Ur had the power of a wizard saint + silver is a demon = ultear had tremendous magic power.

tartarus learned of this and decided that the child must die because idk. silver wanting to protect them  faked his death and never again came into contact with them. he stayed with great because tartarus didn't know about them but when they finally did, they sent deliora. silver, thinking his wife and son were dead,  disappeared and went to the underworld or wherever. he didn't ever again know what happened because it seems that tartarus don't know about what's been happening around the world. the end