The Solar Eclipse dragon
This story happens after the Tartarus and fairy tail disbanding incident. The stuff about Zerefs army doesnt happen in this story and I won't be telling how everyone got back together, but Lucy had nothing to do with it, it was all Natsu and happy.
After one year the disbanded guild, fairy tail, meets back up in magnolia and re-makes the guild. However, one person is still missing, Lucy Heatfilia. After fairy tails disbandment Lucy became quite popular, she travelled back to the heartfilia mansion after disappearing mysteriously for 6 months and buys the mansion back, slowly bringing it back to its former glory, but she is being accompanied by a black haired girl the same age as Lucy. What the guild finds the most shocking is the huge amount of magical power they both have and there names for each other, Solar for the black haired girl and Eclipse for Lucy. Travel with them as they explain that they are actually sisters and aren't human but ... READ TO FIND OUT!