Feraeri are literal talking animals with supernatural power such as immortality, teleportation, and immense knowledge that could be traced back to the previous civilizations of Terra. In fact, they claim themselves never being "born" but more of a "manifestation" of a certain piece of land.
The Feraeri are often confused with other anthropomorphic Ancients like Wei, the Rat King, and Gopnik or even the Feranmuts, the "deities" of Terra, but they are not related to either of them. Similar with the Feranmuts, the Feraeri have no reliance to Originium unlike the rest of Terra. They are even said to be the key to uncover the "deepest mystery" of Terra.
Feraeri have a primitive "impulse" similar with animals' instincts that influence the way they live. An example is the ancient fight between the "Signori dei Lupi" of Siracusa used as a proxy war among their "Wolf Fangs" nowadays. On the other hand, such instinctive impulse can be overcome, thus allowing them to comprehend intelligence and human knowledge.