A/N yes, i know that Sirius was killed in the last book, but due to the fact that he was my favorite character, I have brought him back to life for my own pleasures. I will try and keep him out of it though as much as possible. Also, Alisande is adapted from the world of Yu Yu Hakusho. Kinda addicted to that tv show right now. Not sure on all the powers, so if I get some of them wrong, sorry. She is an apparition/demoness. But she was raised on Earth in the most unlikely of family's.

All people here, other then Alisande belong to JK rowlings. Ali is of my own making, and any powers and friends she has, other then who belong to J K Rowlings, belong to the makers and producers of Yu Yu Hakusho. This is rated NC-17 due to some smut later on in the story.)

The house was dark as the two brothers arrived at the front door. This did not detear them as they knew that this was just a cover and that they were expected. Since leaving Hogwarts they had been busy starting their shop in Diagon Alley, but they had also joined up with the Order of the Phoenix. Sure, their mother had objected soundly, "OH no, not my babies going in harms way,it's bad enough that you make those horrible gag items that can blow off your fingers, I will not have you join the order!" Their father had been the voice of reason, of course. "Now Molly, they are of age after all, best let them do what they will, with our blessings." They were always able to count on their father for support, he was much more laid back in that way.

They whispered the password to enter and walked into the house. Their entrance was silent, but not needed. Obviously someone had been a bit too loud and the screams of Mrs. Black filled the front foyer, and truthfully much of the house. Sirius and Remus both stood at the picture trying to get the curtains closed. Both sets of eyes of the brothers fell on a red headed beauty standing behind them, laughing loudly at the picture. It took them a moment to realize that the picture was screaming her obsenities at the newcomer. Watching in awe, George and Fred heard the woman say, laughingly, "Awwww, come on Sirius, let me shut her up, you know I can." Sirius just looked over his shoulder at her "I don't think so right now Ali, she is a good watchdog."

Within minutes the picture was silent and the newcomer, Ali, was smirking at the closed curtains. Molly rushed down the stairs towards George and Fred with a strained smile. She gave them welcoming hugs though before they were ushered into the meeting area ahead of the newcomer and Sirius. They sat down at the back and leaned close together and looked at each other. They could practically read each others thoughts. "Damn but she was fine." They looked up and at her, and noticed her in deep conversation with Snape. George wondered what a woman like her could see in the greasy git, and he frowned deeply when Ali and Snape threw their heads back and laughed at something she had said to him. George turned with unbelieving eyes to his brother, who also watched the scene amazed. "Did you just see that? Snape actually laughed."

The meeting finally started and Sirius stood up and smiled to the woman who grinned back. "Ok everyone. Calm down. Most of you know Alisande here, but some of you don't." The brother's leaned forward and Sirius smiled as he saw their interest in her, wouldn't they be surprised by what was about to be revealed.

"Ok, for a quick history of those who don't know, Alisande is Severus's adopted sister. She attended Hogwarts with us and then discovered her real family at the end of her 7th year. What she did during that time and now is her story to tell. But as back then, she was our secret weapon and she is now." George looked surprised by this. He didn't remember this woman going to Hogwarts with them. She must have been adopted long after Snape graduated. She looks about 19. And how could she have been their secret weapon back then? He listened on in confusion as Sirius continued.

"Now this is our little secret all here are under an oath to keep it. The reason Alisande is our secret weapon is she is totally immune to wizarding magic. All unforgivables cast on her just melt into her body. This was discovered, as most of you know, during her years at Hogwarts." Sirius just grinned "I must say, we had a great time practicing spells on her." Alisande just rolled her eyes "But you never knew if they worked or not, most you were ever able to do to me is make it tickle, Sirius." George's eyes nearly popped out of his head "Wait, she went to school with you?" Alisande turned in her seat to observe at the red headed twins and looked curiously at the one who had spoken as his mother hushed him. She gave him a small smile as he turned an embarrased shade of red.

Sirius just smiled "Ok, time for an explanation. This is the part that you don't know. It has since been discovered the reason for Ali's seeming immunity to our magic... She is not human. She is an apparition..." He looked at the see of confused faces and Ali's shuttered one, this was not easy for her. "...a demoness."

A soft group wide hiss of surprise waved through the room. Fred stared at Ali like she had suddenly sprouted horns, while his brother stared wide eyed at the beauty who sat like stone, looking at her hands. She finally stood to face them all and George could see the misery in her eyes that she hid. "Telling the Order was hard to do. It is widely acknowledged through out the spirit world that you do not tell mortals of your presence or your true self. I had to get special permission to inform a group this big from the ruler of Spirit World. Please understand that we tell you this so you will understand that I am on your side and have always been. You accepted me before and while I know your view of me has changed, heck my view of myself changed when I found out, I, at least, would hope that you are still willing to accept my role in this cause."

Greeted with a silent crowd after her small speech, she turned to Sirius and then to Snape. She gave them both a small nod and turned and left the room silently. George watched her walk up the row, towards the door next to him. He curiously regarded her, wondering if what she said was true. Two seats in front of him she raised her eyes and looked straight at him, their eyes held for half a moment and then her dropped as she swept past him and out the door. Pandamonium errupted at her exit.