Part 1 Of Kaiju killer. You were once a human killed by a kaiju but your soul was trapped in a cage by monarch, a secretive scientific organization that specializes in monitoring and observing Kaiju (or Titans) that are present on Terra such as Godzilla and many others. They created a giant Godzilla like mechanic robot that was made to destroy Kaiju as they then transported your soul into the robot to inherit the rage and hatred of a human soul.

Rodan has just awakened from the volcano chamber in Monarchs Mexican outpost 56 as Monarch pilots the mech your soul resides in to the location

Kaiju Killer