When Myria began her work of creation, Rathkealon was the first of her children, an idea given form. Chaos incarnate and given dominion over chaos. She was to hold chaos steady in the face of the destructive tendencies of Nos. Her mother never considered the probability that Rathkealon would resonate more with Nos' tendencies than her own.
Rathkealon's first experience of existence was tumultuous, before she had the opportunity to know herself she saw the creation of things outside of her purview. Things not of chaos but that in her reckoning ought to belong to chaos. That the entity which gave her existence and dominion would choose immediately to take things that ought to be hers she grew bitter.