Crystal's aren't the same as Emerald's

Dragon Slayers are known to be few but maybe there more then people think? Leona Tatiashi is a returning Guild member of Fairy Tail, she's not like the other guild members and isnt into partying but instead enjoys sleeping. Why is it that Leona enjoys sleeping more then being with others? and why is everyone getting attacked out of the blue, whats happening! No more Oc's please.