Alright. 
Did you prefer to be the exceed or can I be it? :)
I have a couple pictures - one male, one female depending on the gender of the Exceed. 
[hider=Exceed]
1. [img=http://fc04.deviantart.net/fs70/f/2013/177/8/8/fairy_tail_oc_exceed___seraphy_by_royaleanimequeen-d6as5yd.png]
(No glasses or cape)
2. [img=http://fc08.deviantart.net/fs71/f/2013/221/6/2/fujiko_s_exceed___pikachu_by_xbaka_red-d6hfpzm.png]
[/hider]

Alright so 
[hider=Plot Idea]
Episode Name: Exceed in the Gutter
Main Idea:
Back from the competition, Team Trex needs to make some money to pay the rent. Considering that they are unsure where the next key is, they agree to take a job in Western Fiore. It was a simple job really, deliver a package to a wealthy man in the Capital. 
After completing the seemingly easy task, they run across an Exceed being tortured by some school kids.
[/hider]
Then, it will be reveled that the exceed lost his/her friend - a dragon slayer - and has been searching for some time.