Percy Jackson and the Olympians: Legends

While the other gods could pass for human, or at least human-like, it's immediately clear that Chaos is not of this world, yet even she has some human characteristics. Chaos is the female red Primordial who embodies life itself, with red blood eyes and a hellish aura. Her body is composed of cosmic energy, which can be seen transparently.

This primordial spectator is the keeper of secrets. They speak in a monotone and without emotion, and yet their voice seems to contain a multitude of separate voices of varying genders, all speaking in unison. Despite their eternal curiosity about existence, they have a distaste for 'small talk' and are impassive. They seem to have a low opinion of the Olympians believing most of them to be either too cocky or too presumptuous for their own good and that they choose to help Zagreus purely out of self-interest, rather than family loyalty. Composed, their decisions are mysterious, and Chaos doesn't like to be talked about unless she requests it.

Chaos is the original Greek Primordial entity who personifies life itself and is the mother/grandmother of the other Primordial deities, one of whom gave birth to the Titans, who in turn birthed the Gods of Olympus.