Urara only is permitted to roleplay as a ghost in accordance with this lore. We'll see how it goes, and if it works out, we'll look at ways of opening it up to more players without letting it get out of hand like so many things have in the past.
Don't be disheartened. Try seeing Urara and begin discussing now what you plan and hope for. It takes time, but perhaps if you mesh well enough with the lore, you could be considered. I wont try to falsely raise your hopes, but moping wont help. Id' try talking to Urara ^.^