Cail Cousland

Cail Cousland is the younger brother of Fergus. In an alternate timeline, he defeated the Archdemon and ended the Fifth Blight.

Background
Cail was the youngest child of the ruling family of Highever. Growing up, he was always at his older brother's side.

In 9:30 Dragon, his family was betrayed by Rendon Howe. He escaped with the help of Duncan and joined the Grey Wardens.

After the Battle of Ostagar, Cail was one of the few surviving Grey Wardens. With the help of Alistair Theirin and Morrigan, he united the various factions of Ferelden, raised Alistair to the position of king, and defeated the Archdemon.

To survive his encounter with the Archdemon, he agreed to a dark ritual with Morrigan and father her child. The child would take in the essence of the Archdemon, saving Cail's life. Morrigan disappeared after the Archdemon was defeated.

Cail, now Warden-Commander of Ferelden, continued to serve and clean up the remnants of the darkspawn. This included killing the Architect and the Mother.

In 9:32 Dragon, Cail pursued Morrigan. He followed her into the Crossroads. While there, Justiel altered the timeline, undoing Cail's heroic actions. Cail left the Crossroads to set things right, but since he was technically 22 years dead in this new reality, he vanished from existence.

Dragon Age: Intervention
In 9:10 Dragon, Cail is targeted by Justiel and assassinated as a child, altering the timeline.

Relationships

 * Fergus Cousland - Cail's older brother, who he followed without question until he joined the Grey Wardens.
 * Morrigan - He and Morrigan were romantically involved.