Cain/ Japheth must be comfortable making strong choices onstage. Cain is passionate, curious, longs for adventure, and places the blame squarely at his parents' feet for giving away his portion of the Garden. He is angry at Adam, Eve, Father, and the unfairness of his circumstances. He doesn't return from beyond the waterfall with the intention to kill Abel - but, he allows rage to overtake him, and must endure the consequences. Japheth is more polished than Cain, though has a similar rebellious streak that almost results in the same tragedy. His love for Yonah is his driving force, and he is willing to risk everything in order for them to be together. Cast a fantastic singer and a wonderful actor as Cain/Japheth. Remember, these roles require some stage combat, so make sure to cast a mature performer who can be trusted to execute fight choreography safely.