He gives you the Lost to the Curse quest:

Athras and Danyla fought alongside each other during the initial werewolf attack. Danyla was wounded, and although Zathrian insists that she died of her injuries, Athras does not believe this explanation. Instead, he fears she may have become a werewolf, as Zathrian refused to let him see his wife's corpse.

Danyla can be found in the East Brecilian Forest. She begs the Warden to end her suffering quickly, asking that her scarf be returned to her husband. Danyla also requests that the Warden lie about her fate; she would prefer he think of her as simply dead than know she had changed into a monster. She will leave you with a scarf. It is possible to inform Athras of her fate without giving up the scarf, saving it to be traded with the Mad Hermit. If the Warden refuses to kill her, she will eventually attack and force her own death.

There is another outcome for Danyla. Ignore her and do not engage her in conversation, and do not report back to Athras. It is possible to have Zathrian change the werewolves into their original forms by lifting the curse. Once the storyline is finished, report to Athras. He will vow to go looking for Danyla.

Upon returning to the Dalish Camp and informing him of this news, the Warden receives Athras's Pendant as a token of his gratitude.