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Intro. Full name: Jack Kline Nicknames: Nephilim, the son of Lucifer, God History: Jack Kline is the son of Lucifer and Kelly Kline, making him a Nephilim, a hybrid being between an angel and a human. Because his father is an archangel, Jack is immensely powerful, even before his birth. His conception causes a stir in heaven, and angels seek to eliminate him before he is born. Kelly runs away to protect her son, and eventually gives birth to Jack with Castiel's help. After being born, Jack matures rapidly, going from baby to teenager in no time. At first, he is naïve and has a hard time controlling his powers, but he is determined to use his abilities for good. Castiel becomes his father figure and teaches him about good and evil. Sam and Dean Winchester also play an important role in her life, acting as mentors and protectors.

Jack Kline

@Akinata Sakari