Gremory

"How cute... the little dragon and his group want to fight little old me? Well then, please don't die. Otherwise, how will I enjoy myself...fufufu"

- Gremory

Gremory is a demon created by Lucifer millions of years ago. She resurfaced shortly after the defeat of Trihexa. Gremory and her brother, Sitri, entered the Azazel Cup under the alias, Rem. There she faced off and easily defeated other teams. In the Azazel Cup Finals, Gremory faced off against Issei and his team revealing her demon status in the process.

Trivia

 * Gremory's appearance is based off Melascula from Seven Deadly Sins.