Jay Kulina is Alvey's disgraced son and Nate's older brother. He is one of the main characters of Kingdom, and is portrayed by Jonathan Tucker. Personality Jay is energetic, headstrong, unpredictable, hot tempered and very protective of his family. While Jay and his father have a rocky and complex relationship, he deeply loves his younger brother and mother. In many ways he has acted more like a parent to his brother Nate than alvey has, and is more responsible than Christina. His mother abandoning him has left him with emotional issues in all his romantic relationships, as he is deeply jealous of other men in his girlfriends lives, though he is not unreasonable. While he confronts and asks Laura's friend and former boyfriend to stop taking her to parties, he doesn't have a problem with them spending time together. Though this still ends his relationship with Laura regardless.