I dont know why you would want Aerie back , but if you realy do , here is the deal
SPOILER ALERT !!!!!!!!!!!
*
*
(*
*
*
*
*
*
*
*
*in bhodis coffin room where your final battle takes place , there is a room off to the left with a trapped chest in it. open that chest and take the 3 books out of it.they are various books about vampires and vampirism. Next , go to the temple of Oghma in the docks district with bhodis heart , the 3 books and Aeries body. The priests there will revive her and cure her. OR you can just leave the little whiner for dead , and grab Edwin for your mage and Viconia for a cleric and a hottie all in one
------------------
I am human just like anyone else , when you cut me , do I not bleed, right before I beat you like you stole something from me you no good little @#$^*&(*!&*(^$!%@!(*^$@$#