- "Up here I was just a file clerk—down there I am a King."
- ―Onibald Daykim
Daykim was employed by the Corusca Bank (Imperial Palace branch), as a low-level manager. Due to a simple accounting error by a member of his staff, he became the most famous person on Coruscant for two hours. The error caused Emperor Palpatine to be placed at the top of the public list of loan-defaulters in the Imperial City for two hours. In retribution for this embarrassment, the Emperor fired the entire board of directors and sought out the one personally responsible for the error. Daykim, along with his fellow bureaucrats, fled into the depths of Coruscant's Undercity to avoid capture.
In the Undercity, the bureaucrats remained loyal to Daykim, crowning him King Daykim. As King, Daykim received the best of their spoils; fine animal skins, and the shoulder pads and gloves of a stormtrooper.
The group tapped into the energy grid of Imperial City with old generators, and used other discarded pieces of machinery to rig up surveillance to protect their patch. So isolated was Daykim's Kingdom, they were unaware of the demise of the Empire, until Jacen and Jaina Solo stumbled into their territory, after Chewbacca and C-3PO lost them. Daykim returned the twins to the surface, but despite assurances of the New Republic's benevolence, decided to remain in the Undercity, rather than return to the bureaucratic dullness of surface life.