It didn't come naturally. Not at all. But then it wasn't necessarily a natural occurrence for a demon to fall in love with an angel.

Charles was always in the shadow of his brother. They never saw each other, they had no need to, demons have no sense of "love" for their siblings. They only needed to be raised by their parents and then they were on their own, unlike angels even the parents didn't care particularly for their offspring.

He felt invisible, lost.

His brother was always in the limelight, being older, more experienced. They had the stereotypical human sibling relationship, one better than the other, rivals. The younger was shy, plain and useless. At least that's what he felt.

Until he saw her.

It was one of the rare moments he was spending time with his brother when he spotted her.

His brother had just been told that, in 16 human years, he would be summoned by a human child he would have to serve for eternity. Demons were always warned about their next meal, the things that would go wrong and how to fix the mistakes. The demon's popularity increased dramatically, as word spread, he became almost famous. When news reached Charles, he sought out his brother, to see if it was a rumour or the truth.

The brothers discussed it, the elder demon was incredibly excited, he'd even started to ask everyone to call him "Sebastian", which he'd been told was the name the young boy was going to use. Charles was more pessimistic, warning his brother that he wouldn't be able to eat, if the boy did manage to become a demon as well. The older sibling waved off the response, mumbling something about being able to fix it.

"Humans are easy." He said, smirking. Charles sighed, letting his eyes wander.

Then, he saw her. She was surrounded by a faint white glow in the dark of hell. Her silvery hair fell around her shoulders, curling past a pair of feathery wings, tucked behind her back. She walked gracefully, no sense of fear in her icy eyes, towards the guards of the gates. She whispered something into one of their ears.

'Aah, a messenger angel.' Charles thought. Only the bravest were allowed to relay messages to hell, even then they usually looked down on the demons with disgust but she looked around curiously. She was something special.

The angel turned away from the guard, bowing her head. She glanced around the darkness, trying to pick out her kind's rivals. The area was lit by pairs of pink, cat-like irises watching her every move. She locked eyes with one of them, who smirked and winked. She shuddered, knowing exactly who that was, angels had heard the news of the eternal butler as well. The angel could only feel sorry for the boy, in 5 years he'll come into this world an innocent child and leave it either as vermin or in the pit of his butler's stomach.

She looked away from the future butler only to find herself looking straight into the eyes of another demon. This one's face was softer, almost welcoming. They held eye contact for a minute, assessing one another, until the demon finally looked away and began to have a conversation with the demon butler beside him. Her lips curved into a small smile and she left.

Charles watched her go, enchanted, as his brother talked endlessly about the boy, oblivious to what had just happened.

This was just the beginning.

Charles had been summoned twice to earth before they met again. He was returning from the human world, full and happy after a rather easy meal, when he noticed her familiar white glow illuminating the gates of hell. The demon watched her delicate hands close the gates behind her, sealing the horror of hell away. He felt the urge to say something but his throat was dry and his lips wouldn't produce the words. In this moment he needed his brother's confidence. His chest heaved and he looked to the ground, trying to gather his thoughts.

This feeling, it disgusted him, it was so weak, so human.

She was an angel, she was weak, he didn't know her, but she captivated him after only one meeting.

He inhaled deeply and slowly raised his head, only to be met by pale blue eyes watching him. This stare was different, no curiosity in her look, just plain hatred.

"Returned from stealing another life, have you Akuma?"

Charles flinched, the words stuck like knives. He wanted to say something but he couldn't make a sound, his mouth forming silent words. She looked at him, coldly.

"Silence isn't a normal trait most demons possess." She remarked.

"Th-there is nothing to say." He replied, staring at the ground as if it was the most interesting thing in the universe.

"That's certainly a first." She smiled. The angel began to walk away.

"What's your name?" He asked, feeling bold.

"Why do you ask?"

"Because I'm interested."

"You demons are never ones to hold your tongues."

"I suppose not." He inhaled deeply, unsure of the words that were about to escape his lips. "You are beautiful." He looked up into her eyes, "See? Not holding my tongue."

"Eve." She whispered, holding out her hand. "My name is Eve."

"Charles." The demon took her slender hand in his.

Heaven mixing with Hell.

Good mixing with Bad.

White mixing with Black.

Making Grey.

Grey was the colour of her eyes. She lay cradled in her mother's arms as their sentence was announced, they're immortality stripped from them. Humans.

They lived amongst humans, they brought up their child as a human, essentially they were humans themselves.

The humans treated them no different than they would to another human, they couldn't sense what the family really was and were much more interested in their own lives than others. There was another level to humans than being simple dying souls with the angels or revengeful and desperate with the demons.

They cared for their daughter, as any normal human parents would do, wanting to be with her every second of the day. Not allowing her to attend a human school, they taught her at home, everything they knew.

They named her Catherine Verloren, Pure Warrior.

For three years it didn't cross their mind what would happen to their child after they were executed, it was black and white to them, she would be safe in a reaper family but it didn't occur to them that a demon judge may not be trustworthy, why would he be?

Charles had an idea the night a toddler Catherine asked for a new story. He told the half-and-half about his brother every night, drilling his image into the girl's mind, hoping one day that she would be able to find him and his brother would explain everything to her. It was his last string of hope for his daughter.

The night everything went up in flames, the night the damned couple took their last breath, using it to call her name, to wake her, to warn her.

Her name. And one final sentence.

"Look for Sebastian."

Eve: the angel lead astray by a demon.

Charles: the lost warrior.

Author's Note

This chapter's a little different but I hope you enjoyed it nonetheless. It was mainly just to clear up the details of Catherine's parents because I felt it needed saying :)

Please leave your feedback!

meow cats r awesome, werehogdog & awesomeninjamonkey: Thank-you for your reviews, they were very sweet, I hope you enjoyed this chapter :)

Anonymous Guest: You are becoming one of my favourite people in the world, your reviews really make my day, thank-you!

Quick question for you guys: did you watch Black Butler dubbed or subbed?

I watched it dubbed because I'm lazy, plus Grell's and Sebastian's voices are priceless I love them :D

Bit of a problem about the next chapter, it's either coming tomorrow or in two weeks time, I apologise and hope you can forgive me :/