Board Thread:General Discussion/@comment-49.149.241.33-20141101114751/@comment-31232301-20170313055457

Im going to take a wild guess and say that it was a werewolf, who is in fact Narfi. So according to Norse mythology, Narfi (son of Loki) is killed by his brother Vali who had transformed into a werewolf. In other sources it is Narfi who becomes a werewolf and kills his other brother Nari.

Perhaps Narfi contracted lycanthropy and killed his sister shortly after his transformation. If so, maybe he realised what he had done and was driven mad as a result.

It seems a tad bit far fetched especially considering his sisters remains are found in the river. Personally i think the story is more interesting since it is left up to us to theorize about Narfi and Reyda