Primordial Entities

The Primordial Entities are the most powerful beings in both the known Universes. They come in two variants, the Fae and the Immortal Demons.

Fae
Fae are magical beings that exist to keep higher magical order, such as preventing the Demons from escaping Inferna. Their queen is Tïtania. They live in Phantasia. They are entirely composed of magic.

The fleur-de-lys represents the Fae. In real life, it is a symbol of hope and a heraldic crest.

Immortal Demons
Immortal Demons are the dark magical counterpart to Fae, entirely composed of dark magic. They were once ruled by Zanzazia, but their current ruler is unknown. The immortal demons have some form of hierarchy; a demon named Zarqin is a general and Gonzaro is a servant.

Immortal demons also share a connection with demons, their mortal variant; it is unknown of Fae have any such counterpart.

Known Primordial Entities
Tïtania is known to be the queen of the Fae, residing in Phantasia.

Khioneus Nevula is capable of transforming into a Fae for a limited amount of time.

Gonzäro is known to be a servant in the realm of the Immortal Demons, and he most likely has an association with the Blue-eyed immortal demon.

Zanzazia was once a queen of the Immortal Demons, though it is unknown if she is currently.

Powers and Nature
Nigh-Omnipotence: Primordial Entities can do almost anything, though usually this power is limited to the interior of their essence. Khi was able to beat two Immortal Demons in his Semideus form and open a portal to a random universe; Gonzaro was capable of trapping multiple people and withstanding Khi's power. Fae specifically cannot interact with or view The Wildlandes unless already within them, and Immortal Demons usually have their powers confined to the interior of Inferna due to their imprisonment there.

Nigh-Omniscience: Primordial Entities can know many things with little to no effort, though it seems that Semidei's knowledge is somewhat spotty in that they may know the names of concepts but not really their associations.

Immortality: The Fae and Immortal Demons are immortal and lack physical bodies.

Expansion: The essence of Fae and Immortal Demons expands outward and multidimensionally, sort of conquering space. The power of another primordial entity can prevent this expansion.

Limitations
The reason the Fae cannot help with mortal crises like the Triskén crisis is, according to Khi:

"The Fae are not allowed to interfere in the happenings of the worlds unless the Demons come, and even then the Fae could not enter or interact with or even see in certain places, such as the Demonic Wildlandes, a continent on the other side of Pyrhithya which was where the aforementioned Demon Portal was."

In other words, the only times the Fae do anything is if the immortal demons are to be released from Inferna.

The Immortal Demons, on the other hand, are perfectly capable of being trapped by the Fae, and most likely the Fae are as well. This prevents them from exerting influence on the world.

Trivia

 * Fae are Irish mythological spirits, also called fay or fairies, which is what Khi called pixies
 * In various folklores, demons are spirits of chaos and evil