Kristoff

Kristoff was a Grey Warden who battled the darkspawn in the aftermath of Battle of Denerim and investigated curiously organized darkspawn raids that lead him into the underbelly of Amaranthine in Dragon Age: Warden's Fall.

Background
Before being recruited into the Grey Wardens, he was a bounty hunter who was familiar with the seedy underbelly of Amaranthine. He married an Orlesian woman named Aura.

Trivia

 * In Warden's Fall, Kristoff is a short-haired warrior wielding a two-handed weapon. In Awakening, he is a bald man with a mace and shield.
 * Aura mentions Kristoff having a grandfather who was also named Kristoff. Considering that she is from Orlais, it is very likely that the Warden-Commander Kristoff mentioned in Dragon Age: The Calling is the said grandfather.