Adria

Adria is a Titan first introduced in Fireteam Weasel. She servers initially as a supporting character in the second season before being revealed as a villain under the control of John. After her defeat at the hands of Erika, Adria disappears, vowing to return.

Alive
Adria was a member of the Vanguard Preservation Society on Mars before being murdered by Fale.

Taken (Pre-Fireteam Weasel)
At some point she was revived by John as a Wraith. Unique among Wraiths, the Taken Adria can choose to appear as her pre-death self (although whether this is a specific illusion power or merely clever impersonation is unknown). When Yuki Lynn and Lady Brynn's Fireteam infiltrated the Dreadnought, Yuki stepped through a portal to the Ascendant Plane. This brought her into contact with the Taken Adria, who corrupted Yuki and unleashed her back onto the Dreadnought. This caused the deaths of most of the Fireteam.

Fireteam Weasel
Adria eventually encounters Erika in the Plaguelands, and offers to guide her. She takes Erika to the Dreadnought before disappearing. When Erika steps through a portal that takes her to the heart of the Dreadnought, Adria is revealed in her Taken form, and John subsequently Takes Erika, turning her against her allies who have also infiltrated the Dreadnought. Erika, however, overcomes this and turns against Adria and John. When John flees, Adria vows to return and disappears.

From The Ashes
During a routine sweep of The Dreadnought led by Lady Brynn, Yuki Lynn jumped into a portal to the Ascendant Realm. In the Ascendant Realm she encountered Adria, who corrupted Yuki and forced her to slaughter her Fireteam, leaving all of them dead save for Lady Brynn and Callisto. Upon being knocked out by Callisto, Yuki was taken to Eris to be purged of Adria's influence, leaving the latter once again stranded in the Ascendant Realm.

Armor

 * Desolate Helm
 * Desolate Gauntlets
 * Desolate Plate
 * Desolate Greaves
 * Mark of Desolation

Weapons

 * Soulstealer's Claw (White Chroma)
 * Black Spindle (Cold Between Stars Ornament)

Armor

 * Kellslayer's Helm
 * Kellslayer's Grips
 * Kellslayer's Curiass
 * Kellslayer's Greaves
 * Mark of a Kellslayer]

Weapons

 * Soulstealer's Claw (White Chroma)
 * Black Spindle

Armor

 * Reverie Dawn Helm
 * Reverie Dawn Gauntlets
 * Reverie Dawn Plate
 * Reverie Dawn Greaves
 * Reverie Dawn Mark

Weapons

 * Malfeasance