Well, in my grave robbing fantasies, the dead girl would have to be fresh and intact in order for her to be appealing to me. Also, I fantasize about a dead girl being in a pretty dress of various types and putting her in a body bag before taking her home with me and after injecting her with an anti-decomposition chemical, make her into my love doll to cherish and love forever.
With Anime and manga characters who've died, I fantasize about digging up their bodies from their graves and making them into love dolls to love too.
Also, I've got similar Grave robbing fantasies that involve dead lolis and shotas. In my fantasies, I can't bear to see a beautiful child, teen girl or woman rot away in the ground so I work to save their bodies from such a terrible fate and preserve them forever.