The title of the chapter has several meanings. Firstly there’s the ghosts, people that once were. Next there’s an actual shift in the dynamic between Adrik and Fae, to more of what it once was before Fae’s memory wipe. If you can actually believe it, once upon a time they got along a lot more like siblings or cousins than how they have been getting along in the story so far. And the third and final meaning behind the chapter’s title has yet to be revealed.