Mellyroon

Mellyroon is an elf girl who lived on Mipross Island in the past. Originally, Mellyroon was killed by the mazoku Joyrock when he slaughtered all the elves of Mipross. However, a time-travelling Lina Inverse was able to destroy Joyrock and save the lives of the island's elves, including Mellyroon.

The human boy Rowdy Gabriev, an ancestor of Gourry Gabriev, had a crush on Mellyroon as a child. However, Hajime Kanzaka stated that Gourry is not descended from Mellyroon, because she ages much more slowly compared to humans.

(Source: KanzakaDex)