Celina was an ISO, born from the ether of the Grid. SHe and the rest of the ISO's who survived the first wave of CLU's purge went into hiding, but that wasn't enough. They needed to be able to protect themselves. SHe and several others, more cunning than most, learned how to navigate the grid and steal those thing to make survival possible. When Celina learned of the upgrade to the Light Cycles, she immediately moved to acquire one. It had been a ruse, designed by CLU to flush out the remaining ISO's. With the help of the traitor, Zeus, CLU allowed Celina walked to walk into a trap. SHe was eventually ridden down by CLU's security forces.