Haga was a woman of Clan Nifferlin, the sister of Bugi and Lyma and the aunt of Fyllis and Maelys Nifferlin. Following the God-Emperor's rise to power, Haga, along with her two sisters and two nieces, survived by utilising Fyllis' ability to deceive wisp-watchers. Later, Haga, Lyma and Bugi mastermind a plan to use Fyllis' talent to free Cryl-Nish Hlar from Mazurhize prison and have Maelys seduce him so as to bind their family to the God-Emperor's.