Lumpawaroo, also known as Waroo, was the son of Chewbacca and his wife Malla. During the Age of the Empire, the Wookiees of Kashyyyk were enslaved by the Galactic Empire. As a child, his mother Malla was taken from him and he was separated from his father. Waroo and other Wookiee children were forced to work as slave laborers at an Imperial child labor camp on the slopes of Mount Arayakyak.

As a slave, he was prized by his Imperial masters for his small hands and ability to climb high. Waroo hated his Imperial captors and nicknamed them "milk-skins." He regarded the signals created by the Imperial inhibitor chips as a song that could drive one insane. He also had a strong sense of smell and could smell his Imperial captors from afar. Waroo took delight in the disabling of the inhibitor chips and the despondent state of his Imperial captors.

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