Ravens are the most intelligent of all bird species and exceptionally long-lived, often reaching 20 years or more.
Many of the Daughters have raven companions, to carry messages.
Ravens can also summon nearby dragons to assist their mistress, in the event of a threat.
But a true Raven Mistress has much greater powers - and a full flock of raven companions.
She can commune with her ravens - and even use "Raven Vision", allowing her to see through the eyes of her ravens.
The image above left shows Raven Mistress Sorrel.
The image above right shows Raven Mistress Maeven.