Twin sister of Vhalek, the two Nieznane rogues (fond of taking the forms of Drow) joined the Zhentarim within Menzoberranzan, eventually hired by Nezznar Baenre as he departed into the world to prove his worth. Partnered with Iarno Albrek to build a mercenary distraction ("Redbrand Ruffians"). As that ordeal came to failure (including her brother's death), fled to Neverwinter. Then sent by Rian Nightshade with Alorrik to Parnast relating to the Tiamat threat.
Killled Azbara Jos, and took his identity to infiltrate the Red Wizards-Cult of the DragonPurple Robes alliance. Killed Frulam Mondath just before being swallowed whole by the white dragon Glazhael the Stormchaser. This enraged Alorrik, who had fallen in love with her. He Dimension Door'd to the dragon's back, and broke the Glass Staff, unleashing massive energies in retribution. The blast instantly killed the dragon and its rider (Talis the White (Kasterel)), Alorrik spared only through a Death Ward tattoo.
Vyerith plummeted down down down from the height of Skyreach Castle, presumed killed if not digested. However, the dragon fell into a chasm far below, repeatedly hitting the walls as it fell deeper and deeper into the Underdark. Finally, it landed on a pillar within the Silken Paths, to crush a hag from the Coven of the Dark Mirage (timely in sparing the Yungbluds). At this point, Vyerith emerged and joined the group, resuming her guise as a light-adapted Drow in their escape from the demon-infested Underdark.
(See: Sky Battle of Giants and Dragons and The Witch's Crew)
The assassin determines she will not seek out her ex Allorik/Iarno, but to be more dedicated to the Zhentarim's campaign against the Cult of the Dragon. While Alorrik joins with Our Party in the events of the Divine Contentions: Leilon, Vyerith plays key roles in spying on the cult in the Western Heartlands, even being among the Zhentarim's team that took down Varram and stole the White Dragonmask. (Only to lose it soon after to a red dragon).
Vyerith rejoins the Yungbluds in Green with N-V, having infiltrated Tiamat's cultists in the Misty Forest, where she and Runi kill the Green Wyrmspeaker, Prince Neron-Vain.
(See also: Forgotten Realms Wiki)