Eldrid is a huge, hulking creature with a body made of rock and lava. He has glowing eyes.
Eldrid works for Matilda Pilqvist. She hired him to help shape her winter garden.
Hilda, Frida and Kaisa encountered him when navigating a magical maze to reach Matilda. Hilda and Frida mistook him for the final obstacle they had to fight. Kaisa offered to stay behind and fight him so the girls could continue, but she knew all along who Eldrid really was, and only pretended to fight him so she didn't have to face Matilda. When next seen, Eldrid and Kaisa are playing chess.
- Eldrid is briefly mentioned in "Hilda and the Ghost Ship"; apparently, Frida had to beat him in a game of chess there as the last obstacle to reach Tildy.
- While Eldrid's true species is currently unknown he possibly is a Fire Giant (burning giants from the realm of fire in Scandinavian sagas) based on his appearance and the shows theme, it seems likely that this is the case