This is a short story or rather a long one-shot that I'll split into few parts. I've been thinking about writing a story about Ghirahim's past to explain his relation to Demise and his motives for his actions, so here it is.
I bought Skyward Sword not long ago and I have only started playing it, so the scenes related to the game might not be 100% accurate but I don't think it will derogate the main plot.
Most beings are born ugly. They grow up like caterpillars in a well sheltered cocoon. Few of those worm-like creatures actually leave their cocoons as a butterfly, their delicate beauty having grown over the years. Only death and age would bring an end to their beauty.
Ghirahim was different. He was born beautiful and yet had never known anything beside ugliness. The world they had created was hideous, a kingdom of failure and dirt of which they were the kings and queens. They were like bugs, a horde of indelible cockroaches that infested these lands like parasites. He, Ghirahim, Lord of the Demons, had to expurgate the ground he was standing on and eradicate them. Scrunch the cockroaches under his feet.
Once again, anger and a lust for destruction took over his senses as he was waiting in the Sealed Grounds. The pale skin of his arms was stained with the ink of hatred, darkening as the black poison seeped into his veins and spread through his body. This was the harbinger of death. The markings of decay.
Not yet, he thought as he inhaled the chilly air with a sharp breath. No, he wasn't ready to die yet. He still had to complete his last mission. Everything was ready. The stage was prepared, the protagonists approaching. A smile played across his sallow lips as he felt the girl's presence. So it would begin.