Eladrin

An Eladrin is a type of fey that was originally called a "High Elf" in the original version of Dungeons & Dragons. They look like tall elves with eerie green and blue eyes and usually live in a magical forest land away from all other peoples, even humans. However, some of them materialize in the game worlds if they have been sent on a mission. Isolde is the only Eladrin residing in Ravenloft, and she is the leader of the Carnival. She came to the evil realm after the Gentleman Caller and had protected people who have fallen victim to his seductive powers.

Sources

Dungeons & Dragons Monster Manual Fourth Edition