Okay, I know that her name has been used before but I really liked it when I read storys with it, so I decided to use it.
I don't own anything except my OC's.

Prologue

The dark had long since fell over Privet Drive and everybody were laying in their beds asleep.
Suddenly, a man with a long white beard and very odd looking clothes walked out of the small wooden area facing the street.

He stopped at the end of it and took something out of his pocket.
He held it up and suddenly the lights from the streetlamps came flying towards it.
When all of the lights were gone he turned towards a cat on the ground and said;
"I should've known that you'd be here," he smiled, looking down at it over his half-moon spectacles, "Professor McGonagall."

The cat seemed to grow and then started shifting into a woman with the same odd clothes as the man.

"Good evening, Professor Dumbledore." She said and adjusted the pointed hat that sat on her head.

They started walking down the street, "Are the rumors true, Albus?" She asked him.
"I'm afraid so, Professor. The good and the bad." He shook his head sadly.
"And the children?"
"Hagrid is bringing them."

"Do you think it is wise to trust Hagrid with something as important as this?" She asked apprehensively.
"Ah, Professor, I would trust Hagrid with my life." He answered her.

They looked up to the sky just as a blinding light appeared by the tree tops followed by the sound of an engine.

A huge man was sat upon what appeared to be a motorcycle, a small child was clinging to him, a black stuffed dog in her hand, and he also had another, much younger, child hanging around his neck in a bundle of fabric.

He took of the glasses he'd been wearing and turned to the man and woman; "Professor Dumbledore, sir. Professor McGonagall." He stepped of the vehicle and helped the small dark-haired girl that'd been holding onto him off.

"No problems I trust, Hagrid?" The man said.
"No, sir. Little tyke fell asleep just as we were flying over Bristol and Cassie's been an angel as usual." The man handed the little bundle with the baby in to the old man and the small girl's hand to the older woman.

The girl looked up at the woman, her face hidden behind black curls and her violet eyes shielded by dark lashes, "Daddy said he'd be back. Why isn't he back?" She said with a small broken voice, tears filling her eyes making the older woman's heart clench.
"Cassiopeia," She began, "Your father isn't coming back." The small girl's tears sprang free and started rolling down her rosy cheeks at the woman's words and she hugged the stuffed dog in her arms tightly, sob raking her small body.

The woman turned to the old man, "Albus, do you really think it's safe to leave them with these people? I've watched them all day. They're the worst sort of Muggles imaginable. They really are-" The man interrupted her.
"The only family he has and therefore, the only family she has." He said and turned to the young girl, "I need you to look after Harry, Cassiopeia. He will need you." He handed the boy to the old woman and crouched down, "Can you do that for me?" The girl nodded and the man took something out of his pocket and put it around her neck, "Do not lose this, Cassie." He said sternly looking into her eyes.

The girl nodded, "It's mommy's." She said looking down on the locket around her neck.
The man nodded, "It was, it's yours now." He said and rose to his full height again.

The woman turned to him, "These children will be famous. There won't be a child in our world to not know their name."
"Exactly. They are far better off growing up away from all of that," He said, looking down at the young boy in his arms and the small girl clutching the edge of his robes, "Until they are ready."

He put the young boy down on the front step of the house and the small girl sat down next to him, her small arms still clutching the dog tightly, tear tracks on her face.

The huge man behind them sniffed, "There, there, Hagrid. It is not really goodbye, after all," The old man said turning to him.
He turned once again and placed a letter by the young children.
"Good luck," He stated, "Harry Potter and Cassiopeia Black."

I hope you like this and please tell me if I should continue.
To those of you that reads my other story, The Life of Amanda Potter, I will continue to write that soon but I'm having a major writers block so I started this story to write until it disappears.
And, as you might have understood from the title, this story is inspired by the song Safe & Sound by Taylor Swift feat. The Civil Wars, so it might have a quite sad tone and I will try to make Cassiopeia have a slightly deeper and shyer personality than Amanda has in my other story, since I'm used to writing those kind of characters.
I will use that song as a song Cassiopeia's mother sang to her when she was little so she will sing some parts of that quite often.
By the way, to those of you who haven't read that one, please check that out to!

Please R&R!