Kai Chen, played by Archie Kao, is the Blue Galaxy Ranger and the wielder of the Blue Quasar Saber. Strait-laced, sensible, and ambitious, Kai is the classic overachiever. Having been brought up in a strict military family, he always does things by the book and likes everything in its place. His orderly world is turned upside down when he becomes a Power Ranger, and he must learn that sometimes rules are meant to be broken when it comes to saving the universe. He is apparently a good friend of Kendrix Morgan.
Kai's strict adherence to the rules initially causes much conflict with Leo, but after an incident in which the Quasar Sabers were stolen, Kai warms up to him considerably.
Kai is the first known male Asian-American Blue Ranger. Successive Asian-American male Blue Rangers are Chad Lee from Power Rangers Lightspeed Rescue, Lucas Kendall from Power Rangers Time Force, Blake Bradley from Power Rangers Ninja Storm (though technically the Navy Ranger), Dax Lo from Power Rangers Operation Overdrive, and Theo Martin from Power Rangers Jungle Fury.
Read more about this topic: Galaxy Power Rangers