Fairy Tail by Hiro Mashima.
Plot & Idea by Hells Gate.
Hades by Greek Mythology and Hells Gate.
Neficius Infirmitus by Shadowdragon2k.
Gray Fullbuster by Hiro Mashima and Hells Gate.
Kovu Shriram by Saeko-chan.
Raquiel Ashmore by Miraellayne/Das Handtuch/Jigoku-Bana.