Here is a page for posting theories, long and short, realistic and crazy, about the show. So stop filling up the comments sections with them! :)
Theory 1. Gen was betrayed by someone in his past, right? Well, my theory is that that person was a girl his age who is half human, half corekai. She gave him the dromus core brick and showed him the portaL in the warehouse. When he convinces her to take him to Quarton, they find a newly awoken Villius and a world on the verge of war. She insists that she must stay and help the corekai while he go back. When Gen refuses and says he should help her, she forcibly sends him back. He is left with a scar near his eye which is reflected on his corekai form, a feeling of deep betrayal from his only friend, and a desire to begin anew where he is the master of both worlds so no one will do such a thing to him again. Suggestions for names, anyone?