Witches are basically Humans that can naturally manipulate the magical energies around them without the use of Engraved Tools.
An Angel is a nearly indestructible divine being. They are often benevolent and act as intermediaries between their "Father" Yahweh and Humanity.
Fallen Angels are the result of Angels that come in contact with the "Dust of the Earth".
Nereids are an aquatic sapient lifeform with the upper body that closely resembles that of a human and the tail of a fish.
Elves are a sapient humanoid lifeform of short stature and long limbs.