Loki is the son of Rukal and Lakspura. The influence of Chaos was still very strong in their blood in the early days of humankind and there were many mutations in the appearance of these early generations. This was clearly shown in Loki and his sister, Ekanel who had slightly serpentine appearances. He had two other siblings, Spiro and Polyphamora, of whom he and his sister killed and ate while hunting.
Loki and Ekanel then went on to become the ancestors of the modern day Serpents.