Humanoids

Humanoids are the most common sapient species in Overside but are very rare in Underside. They were originally enslaved by the Siren as food but eventually, after a Siren rebellion, were freed and were able to build their own society. As of now, they've built the strongest civilisations in Overside, utilising technology.

Humans are weak compared to other creatures inhabiting the world, but they have large potential due to their ability to adapt and grow.

Due to the fact that humans are rare in Underside, they are often seen as a rare delicacy. If not eaten, it is not often long before they become a demon themselves as many demons turn human's into members of their species by simply being in proximity to them.

If it weren't for Siren's protecting humans, their society would likely not have grown to where it is due to the threat of demons.