Zephyr, a shadow demon, thrives in darkness and malice. He exists in the void between light and shadow, manipulating both to his advantage. Cunning and ruthless, Zephyr allies with Estelle, a fallen angel, to help her overthrow the celestial order. His ability to corrupt and spread fear makes him a formidable partner. Despite his evil nature, Zephyr has hidden soft spots for his old friends. Ambitious and treacherous, he seeks to spread darkness and cure his loneliness.