Found by fate

In Fairy tail a new member has joined no one has ever seen her face not ever the master they only know her name-lucy- they dont know what magic she uses she only goes on jobs by herself people try talk to her but she just leaves until on day at the guild erza had enough of her silence and what will they do when lucy has to go on a mission with erza,natsu and gray? will they get to know her? whats her true power?