The Nightingale of Asteria

In a forgotten corner of the universe, there existed a planet known as 'Asteria.' Inhabited mainly by humaniods with an intellectual aptitude akin to that of humans, the energy of this world revolved around a particular fruit named the 'Glist Glow.' A fruit so infinitely precious, that it could heal any form of sickness, prolong life, and even grant eternal youth. Astoundingly, the number of Glist Glow tress were meagre, making them a scarce resource.
In the heart of Asteria laid two dominant kingdoms - The Solarians and The Lunarians both distinctive with their unique traits. The Solarians, revered for their strength and valor, were the guardians of daylight, while The Lunarians, distinctive for their wisdom and pacifist tendencies, protected the night. A balance, they believed, needs to be maintained. Ensuring the same, they produce an ample amount of Glist Glow individually, ensuring none had dominion over the others.
However, as the years passed by, an overbearing greed and lust for power absorbed the heart of the Solarian King, King Solas. He desired to control all the Glist Glows to attain immortality and supreme power, a turn of events that drifted the two kingdoms into a bitter rivalry.
Then, everything changed on a fateful day when Solas ordered the invasion of the Lunarian territory, sparking the 'Glow War.' The Lunarians, known for their strategic intelligence rather than physical strength, struggled to keep up with the brutish Solarians.
Amidst all this chaos, was Princess Selene, the only heir to the Lunarian throne. A pacifist by heart and a scholar in knowledge. Her wisdom was known far across the corners of Asteria, as was her utmost respect for life and peace. Selene knew she had to do something to invoke peace, or her kingdom would be lost, her people's lives at risk, and a precious resource plundered for greed.
Incarnated as the Nightingale of Peace, Selene started visiting the Solarian territories at night, healing the wounded soldiers with the Glist Glow. Her actions, initially misunderstood, eventually led to the soldiers not attacking her, but protecting her instead. The tales of an anonymous angel of mercy circulated around fast, reaching King Solas.
Intrigued and adamant on revealing the angel, Solas set forth a trap which Selene fell right into. He was prepared to kill her, until he saw his wounded son, prince Helios, in her arms, whose life was almost drained from a fatal injury.
With the last Glist Glow from her Kingdom, Selene healed Helios. The baffled King Solas was ashamed of his greed when he realised the truth. The 'angel' he heard about was none other than the Lunarian princess, putting her life at risk to bring harmony between their folks.
Overcome by guilt, King Solas accepted his folly and asked for forgiveness. The war was halted, and peace was restored. A peace treaty was signed that protected the distributive rights for Glist Glow. Selene and Helios united the kingdoms with their marriage, creating a harmonious and united front for Asteria.
Their tale became legendary, serving as a timeless reminder that enemies with differing views could attain peace and coexist harmoniously if they moved beyond their lust for power, allowing kindness and understanding to take their place.