The Birthless are the oldest known beings in the entire universe. They came into existence at the same time the world had to exist in several different planets, planes, and dimensions. They are the creators of the Gods, and while not all-powerful themselves together, they can make individuals of their choice infinitely powerful.
Birthless can take any shape and can have an affinity for the different mana types. The affinity they have is determined by the place of power they last emerged from. Birthless will always more than one affinity, but some have been known to emerge from ley lines that have all 19 mana types at once. The initially appeared as balls of light, but as they learned of Mortals, they mimicked the different shapes that mortals took.
The core values of a Birthless are very loose as they are less emotionally driven than Mortals and Vagary. Often times, they go with a direct approach to solve a problem in a way that won't branch out too far, but that is only when it comes to personal issues. When they share a problem with other beings, this complicates things, and in most cases, they will simply do what the other beings want and then worry about their own desires after the other person's wishes are taken care of. This is not because they are selfless but because Birthless do not age, and mostly live forever so long as they are not killed or cut off from their place of power.
This nature has led them to follow Mortals more often than not, sometimes in secret, and sometimes for the entirety of a Mortals life, without the mortal having even known they were being watched. Mortals who have discovered the Birthless watching them have described these Birthless as obsessive and possessive of the beings they choose to observe. In some cases playing pranks, or practical jokes just to get a reaction. This is not to be vindictive, or intentionally cruel, but in some cases, they lack the ability to understand emotional responses to cruelty or pain.
Birthless ability to learn ranges from whit less to hyper-intelligent, in most cases the less intelligent Birthless are more like wild animals. In other instances the Birthless can literally rewrite their own minds to be capable of solving very complex problems. The level of intelligence is also dependant on what the birthless currently desire, rewriting its intelligence to get the best results out of the perceived objective.
Mortals have perceived Birthless in many ways, in the earlier times referring to them as wisps, spirits, ghosts, apparitions. In the more modern and educated setting, they are well researched and well known, but because they can come from different planets, and different dimensions, the depth of research into Birthless is infinite.