When you visited Creche Kil'ir you looked up on the moon and it spoke to you. It accepted your worship but asked you to keep your faith secret and to keep an eye out for others who might need to keep their heart hidden in shadow and bring them to the light.
It told you that a great trial was ahead but it knew you were up to the task.
I gave her the assassin / gloomstalker build and it was great. All shadow related with voice lines to support.
"I love the sound of lockpicking . . ."
