Child of the Gods

There have been Demigods- half god, half humans- throughout the centuries but Roselyn Aura isn't exactly the same. She was created by her mother and the Olympian Gods to fight a war that never came to pass. Roselyn just found out she has all the powers of the Olympians. However, the only reason they told her is that there is one other like her, who is much more experienced and believes he's entitled to run things on Olympus... What will she and her band of demigods have to do to make sure that doesn't happen?