The moon focussed its energy down on the earth.
There was a boy down there. One who had done a noble thing- one deserving of a second chance. He died to protect his sister, and such a heroic deed couldn't go unnoticed. So he was bringing him back. Giving him the opportunity to live again- just, not as alive as he had been before.
But there was something else about this boy. The moon had recognised a goodness in his character- light. Joy. A strong, caring heart. And it was for that reason also he was bringing the boy back. Perhaps he would even be one day worthy of the great title "Guardian". Yes, he could see the makings of a great Guardian in him, but he would have to wait.
He would need to grow, and he would need to learn much before he was ready for that title... And he would have to wait until he was needed, because that time was not yet. He could only pray the boy would be patient.
As he restored the boy to life, though- or the semblance of life he could give him- he was worried. The boy's spirit had to be rescued tonight, before it faded and travelled beyond his reach. But the timing was greatly unfortunate, for tonight was an eclipse. The shadow of the Earth slowly blocked his light, even as he resurrected the boy, and he could only hope he managed to do so completely before his time ran out and he was hidden from the world.
He was almost there. The boy had opened his eyes. Staring at him with the wide, innocent spheres he had changed to the colour of the winter sky. His hair had also been altered- to the colour of snow, and of moonbeams. All of it signs that he had claimed the boy as his own. He was one of his spirits- his winter child.
This way no other forces could try to take him as their own... and there are plenty that would try. There was potential in him, and a great power. He had died as a child. All that energy, and all that life he would have had still resided within him. He could be a powerful force for good... or for evil.
The moon was getting nervous. The Earth's shadow shutting away its light when he was so close. He needed more time. The boy was not yet claimed- he did not yet belong to him. He was still vulnerable!
He increased his efforts tried to speed the process, but all in vain. The Earth had finally eclipsed its light... But too soon. He wasn't done. He didn't think he'd done enough- he was too late.
The Man in the Moon could only wait, with terror, for the shadow to pass... to see what had become of the winter child.