Joe Gibken is one of the main characters in the tokusatsu series Kaizoku Sentai Gokaiger. As Gokai Blue, he is the quiet and stoic swordsman of the Gokaigers, known for his loyalty and strong sense of justice. Joe serves as the team's second-in-command and handles most of their close combat with dual swords. His calm demeanor hides a deeply personal motivation shaped by his past as a former member of the Space Empire Zangyack.