User blog comment:Project Predacon/Volume 2: Post Credits Scene Analysis/@comment-3146930-20141031002734/@comment-3146930-20141031010458

The picture Yang has of her mother is an edited version of the Transient Princess, a picture of a woman with feathers for hair. Raven's hair appears somewhat feathery, or at least animalistic. This is somewhat demonstrated by her hair becoming more normal when she removes the mask, deactivating her Faunus traits.