How did the rebellious Lu Lulu Luo finally die? Did the hero use all the episodes?

It's used. In episode 19, in order to save Lu Luxiu, Lolo used Geass many times in a short time, and his heart could not bear it and died.

The work describes the great changes brought about by black prince Kururugi Suzaku, who is determined to crush the empire, and The White Knights, who insists on justice, on the verge of life and death when the holy British Empire invaded Japan-11.

Synopsis: In 20 10, the superpower, the Holy British Empire, invaded Japan in order to seize Japan's underground resources. Under the attack of Knightmare, a powerful anthropomorphic weapon of the European Empire, Japan was conquered in less than a month and deprived of its freedom, rights and even its name. The Holy British Empire renamed "Japan" as "region 1 1", and the word "Japanese" was replaced by the number 1 1. On the surface, the imperial rule of the aristocratic class seems unbreakable, but there have been cracks in it.