Raine is a human, who was the child of Maria Silverlock and Eurche. Eurche was a keidran disguised as a human to inflitrate the Templar. They fell in love, had a baby, who was born looking like an member of the Arctic wolf tribe.
While she has a human life span, she looked just like a Keidran. She was forced to stay in hiding so that no-one would discover Eurche's true identity. BUT, Trace the Tyrant found out, rebelled against the Templar order and turned Maria into an Arctic Wolf using a variation of Eurche's magical disguise known as Imprefect Transformation. Everything else you can find in the comic Twokinds.
Here's a link:twokinds.keenspot.com/archive/