Through the Ever Night (Under the Never Sky #2) by Veronica Rossi (2013)
YA Fiction | DystopianBlurb:
“It’s been months since Aria last saw Perry. Months since Perry was named Blood Lord of the Tides, and Aria was charged with an impossible mission. Now, finally, they are about to be reunited. But their reunion is far from perfect. The Tides don’t take kindly to Aria, a former Dweller. And with the worsening Aether storms threatening the tribe’s precarious existence, Aria begins to fear that leaving Perry behind might be the only way to save them both.