The Blind Raven
The Green Raven (Olani)
Every interaction with her during the first few days of the adventure was characterized by her only speaking in past tense and only of the past. Eventually Siobhan mentioned this to her, and her ring was bound to him. He can call upon her power in a time of need, and at certain times she will use it to signal when a good time to use it would be.
The Eyes were brought back from the mortal plane just before death. Raven 1 can only see and speak of the past. Never the present or future. Her name is Olani.