Twilight, Crown of Night

A pup born blessed by the Goddess of Night, his pelt dyed a deep blue-black color that contrasted against his siblings' own. And like the night, he is inextricably attached to the bright star that is their Leader: Apus, the Crown of Light.

———

The harsh winds of the oncoming blizzard tore through his pelt. Twilight could barely feel his paws or nose as he trudged through the glacier. He was a scout, he had trained under the legendary Lyre, Crown of Song, he was made for this.
And yet, he could help but lay down for a nap. He couldn't feel his body anymore…
The world shifted as he felt the moon shift and the world twist around him. He could feel the presence of his patron goddess fall over him.
He woke up in the Lunar Realm. Time here was so much more different than that of his world. The longer he stayed under the moon's guise, the more he could feel himself begin to change. When he'd finally made his way back to the pack, everyone could see that he's changed, the Lunar Realm has has left irreversible marks on him.

Twilight is immortal.