Beef or Luka Milan is a multi-talented figure in the Shadow Universe, known as both a musical artist and a ruthless killer. He is known for his brutality, sadism, and family annihilations. As a member of ISG, he earned the nickname "Beef" due to his role in resolving conflicts or ending beef, which means the end of another's life. Luka Milan's unpredictable lifestyle alternates between his musical career, his life of crime, and his polyamorous relationships. Despite his ruthless reputation, Luka Milan is also known for his humility, particularly evident in his approach toward fellow ISG juggernaut Dylan Jordan. Their classical and memorable grudge came to an end when Luka recognized it as unnecessary.