" Let us speak, for a moment, on the matter of sisters. They can be enemies to fight or companions to lean upon: they can, at times, be strangers. They are not required to be friends, or to have involvement in one another's lives, or to be anything more than strangers united by the circumstances of their birth. Still, there is a magic in the word "sister," a magic which speaks of shared roots and hence shared branches, of a certain ease that is always to be pursued, if not always to be found. "

― Seanan McGuire , In an Absent Dream (Wayward Children, #4)