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She was a citizen of L'Manberg during the presidency of Wilbur Soot, but during the Manberg Rebellion, she spoke out strongly against the Jschlatt Administration, leading to her banishment and subsequent joining of Pogtopia at the culmination of the Manberg Festival. She fought alongside the Pogtopians during the retaking of L'Manberg, and afterwards was appointed as the Secretary of Treasury by the new President, Tubbo. She expressed tentative sympathy for Tommy during his exile, although she still thought that he was responsible for the consequences of his own actions, and would become frustrated by his apparent destruction of the Community House.

She and Fundy later left to form Dry Waters, and Niki grew more detached from L'Manberg, ultimately turning against her former nation and burning down the L'Mantree during the Doomsday War. She has since displayed resentment towards Tommy due to all of the conflict he has caused in the past, and collaborated with Jack Manifold in an attempt to kill him before he could start any more turmoil. She was also a L'Manberg traitor during Doomsday alongside Fundy.

Niki has since joined the Syndicate, and committed to Anarchist ideals. As a member of the Syndicate, Niki participated in operations including scouting out Snowchester to verify it's non-governmental status and facilitating the escape of Dream from Pandora's Vault.