Triandra

A dökkálfr from Dökkálfheimr, the realm of nightmares. Delivers terrible dreams to mortals. Cold and distant, she lives on without hope.

Triandra, as said in her profile, is a cold and distant young dökkálfr. She has devoted herself to the service of Freyja after she rescued her in the past.

Before meeting Freyja, Triandra and her younger sister were badly mistreated by their father who barely fed them, made them dress in rags and did not allow them inside their house even in winter. Triandra did her best to protect her sister, and at some point murdered their evil father in order to save her life. She was found and made into a dökkálfr by Freyja some time later.

In Chapter 12 of Book IV, it's revealed that Triandra's sister is actually Peony. She laments how she wanted to protect her sister from their father before engaging the Order of Heroes one last time. The Order manages to deal Triandra a fatal blow, and she recalls the time she and Peony spent together before she dies.

At the end of Book IV Chapter 13, Freyja uses the last of her power to revive Triandra and Plumeria. Triandra and Plumeria then decide to find a way to revive Freyja from her slumber when they are approached by Líf and Thrasir for reasons yet unknown.

Contrary to her ljósálfr counterpart, Triandra is a pessimistic, deadpan dökkálfr who brings nightmares.

She is exceedingly loyal to Freyja, as even when she remembers her mortal life, she chooses to give her all for her sake.

Despite her status as a villain, Triandra has a strong moral compass, with a desire to do good. One of her stated motivations as a child was to save the world and protect everyone. During her New Years event appearance, she laments that nightmares are usually not welcome, and Peony responds to her concern by saying that nightmare powers can still be helpful.

Triandra also appears to possess an amount of self-loathing due to her past failures and the fact that she only brings suffering upon humans. She states that she does not believe she deserves kindness from others and that they would be right to despise her.