Deverak was one of the three first Oni, born from the shadows of the Realm of the Oni and Dragons. Deverak lead her brothers, Deveranel and Dranel when they took 3 rings of Creation. Deverak had the idea to create more Oni and then her and her brothers became the 3 Oni Warlords, but she was the leading Oni Warlord.
Deverak was also the one with the idea of the 3 Oni Masks. Ever since the First Spinjitzu Master defeated her, Deverak wanted revenge.
When a portal opened to Ninjago, she tried to take it over.