Disclaimer: Any dialogue, event, character, etc. that seems familiar in the Harry Potter universe belong to J.K. Rowling and anyone else who owns them.
The next afternoon as Sarah and Draco stumbled into the house from their snowball fight outside, they both stopped when they heard someone calling to them from the office. As they turned in that direction they were met by the sight of Lucius leaning his shoulder against the door frame with his ankles crossed, as he smiled at them, "Sarah, you're needed in the study," Lucius told her. Sarah nodded and looked back at Draco, who gave her a nod of encouragement. She followed Lucius down into the main area and into his old study.
"Sarah, come closer," Voldemort said, motioning her toward him. There was a map on the desk in front of him, and his Inner Circle stood around it. Sarah took her place to his left between him and Lucius while Severus stood on his right. "These are the cells we need to break into. If these followers are not freed no one will walk away from tonight unscathed." A shudder ran through the room, seemingly hitting a wall at Severus. "Sarah, Severus, and Lucius will be the ones to break them all out. The rest of you will keep the Aurors away from them. You begin at nine tonight when the Aurors on duty are tired of work and counting down the time until the next shift takes their place." He waved his hand and they all exited out of the room, Severus, Sarah, and Lucius being told to stay. "This is finally yours. Congratulations, Sarah, you have proven your loyalty." Voldemort pulled out a pair of black robes with a silver mask lying on top of it, handing them over to Sarah, up until this moment Sarah had worn the black hood and robes that reminded her of the Klu Klux Klan pictures she had seen, the ones the Death Eaters had used at the Quidditch World Cup the year before.
She took them, thanking her father as she did so, and then left the room, staring at the robes. "Congratulations Sarah," Lucius said smiling down at her, "hopefully, Draco will be joining our ranks soon."
Severus stepped forward, realizing that Sarah was getting uncomfortable with the conversation, and placed his hand on her shoulder steering her toward the gardens, "Come Sarah let's get these on for the raid tonight and I'll teach you how to fight in them and how to fly as we do." Sarah nodded, and went into a bathroom as Severus waited by the door. When she was done they headed out Sarah holding the mask tightly by its mouth and eye holes. As they reached the gardens out of sight of the house Severus walked around the robes making sure they fit and were settled around her the way they were supposed to. When he finally nodded his acceptance of the look, he backed up and lifted an eyebrow at her looking pointedly at the mask. Sarah's breathing hitched up with her growing anxiety as she drew it toward her face. She jerked it away, "I can't."
"You must Sarah. This will protect your identity, and will help in keeping your face safe from any spells aimed at it, with the exception of any spells from your father." Sarah nodded and once more moved the mask toward her face, breathing in and out deeply to calm the suffocating feeling she felt right before the mask slid into place, magically locking into position. She reached out to Severus as she started panicking once more, only to realize that he was already holding onto her biceps, something he had done when he had noticed that she was beginning to hyperventilate. He pulled her to him and held her until she had regained control of herself, rubbing her back and whispering encouragingly to her. When she pulled back he began his instruction on how to fight and made sure that she was still able to fly without the aid of a broom like many of Voldermort's inner circle could.
When it was a quarter to nine they headed out and apparated to the cliffs overlooking the sea around Azkaban. After once more confirmation of who was doing what, they then flew across the water and to the prison fortress. Sarah quickly headed into the prison to handle her specific job, defending herself against those who attacked her and hurriedly stupefying anyone who had not had the chance to attack her. When she finally reached her final cell thirty minutes into the raid, she ignored the yelling and screaming around her as she pointed her wand at the door and yelled "bombarda", watching as the door blew open.
She heard cackling from inside the cell as she walked in, seeing a black wild mane of hair on the head of a woman whose black eyes were full of insane evil. She flicked her wand unlocking the shackles, before commanding, "Come along, Mrs. Lestrange."
"Not without a wand," the woman hissed at her.
"Fine, stay here and then you may explain to the Dark Lord why you disobeyed a direct order from one of his commanders, causing him to come out in the open to drag your miserable carcass out of here when his time is better spent working on maneuvering his way into the ministry," Sarah sneered at her before turning and walking away though she kept her wand ready to attack the woman behind her.
"Who are you?" Bellatrix snarled, insulted by the unknown Death Eater, and their nonchalant attitude toward her.
"That's really none of your concern right now is it? Come or stay I don't care which, but don't waste my time and safety with striking up a conversation in the middle of a jail cell in Azkaban," Sarah replied dismissively. She moved out of the cell and started heading down the hall towards the other Death Eaters.
Bellatrix followed before she snapped, "Why'd he have to send you to get me out of here Snape?"
"You have the wrong person, Bellatrix, or has your mind addled itself far more than it was previously, so that you cannot distinguish between a male and female voice," came a condescending reply from the shadows. Sarah watched as Severus stepped from those shadows in his Death Eater clothes, with another man behind him, only to feel something bump against her as she realized that Bellatrix was running at Severus with a shriek of rage. He pointed his wand at her and Sarah quickly jabbed her wand into the woman's back, and Bellatrix halted quickly as he sneered, "Please, attack Bellatrix! Let me put you out of my misery."
"The Dark Lord wouldn't allow you to kill me," Bellatrix spit out, enraged at his words and their cornering her. However, she walked toward him confident in the Dark Lord's favor of her.
"Normally, probably not, but in defense of his daughter, he would. In fact, he would allow me to slaughter the Inner Circle like pigs if it kept her safe." Bellatrix's eyes widened as she took in his words while turning to stare at the Dark Lord's heir that she had planned to murder for the tone she had taken with Bellatrix. "Now come along, neither Sarah nor I have any desire whatsoever to spend an ounce of time more than necessary here," he snapped before striding to the outer walls as the two women quickly followed him.
When they reached the outside area all three flew off in three trails of black smoke, Sarah's trail almost tangling in Severus's, as he stayed near to protect her from the others, especially Bella. Sarah however would not have let him stray far from her anyway as she was trying to keep down the nauseous feeling, from the mayhem that she had seen while leaving the prison, that was trying to overtake her and only his soothing presence was doing that at the moment.
They landed at Malfoy Manor, and Sarah and Severus led the way in. When they reached Voldemort's meeting rooms, Bella moved forward to bow to Voldemort. He barely looked or spoke to her and the others before motioning for Sarah to come forward. As he had done with all the other Death Eaters, he gave them the warning of Sarah not being harmed. When the meeting ended he excused everybody and Sarah charged up the staircase ignoring the reunited family of the Lestranges and the Malfoys.
When she entered her rooms, she ran into the bathroom, and leaned over the toilet dry heaving before collapsing on the floor as her knees and arms gave out on her. Images of the murdered guards and prisoners flashed through her mind and the depressing feeling of the place enhanced the misery of those recollections. "I'm sorry Sarah," Severus said behind her. She felt her body being pulled across the floor of the bathroom and onto Severus's lap.
"Neville's going to kill me." Sarah whispered, remembering that the woman she had just freed had been placed in jail for being part of the torture that led to Neville being a virtual orphan with his parents living in a mental ward for life.
"He will never know unless you tell him," Severus murmured, before handing her a potion, which she took without complaint, feeling the nausea she had fought since freeing Bellatrix settle down and dissipate. "You did what you had to. Maybe we'll get lucky and she will accidentally bring the building down and kill herself, or someone could do it as well, I don't really care which way it works." Sarah snickered, and admitted mentally that she felt the same way. "Are you feeling better?"
"Yeah," Sarah said, unable to hold back a yawn.
"Good. I believe you need to go to bed now." Severus announced, before looking around, "After a bath. Really, Sarah, I think this position is rather unsanitary."
Sarah laughed, before wrapping her arms around his waist in a hug. "Do you really think that the House Elves don't clean this room at least twice a day if not more? I am sure this floor is clean enough that you could knock out the facilities and make it into a surgery room."
Severus shrugged, "Probably, but that is beside the point. Get yourself a shower and get to bed. You have had a long day, and the next few days until you head back to Hogwarts are going to be very long as I am sure the Lestranges will be staying here from now on, since they are on the run and Narcissa is her sister."
Sarah looked up from where she was pulling out her pajamas at Severus's words, to where he leaned against her bed post. "They're sisters?" He nodded, though he raised an eyebrow in annoyance at her forcing him to repeat himself. "Narcissa definitely got the better end of that deal." she told him, before shutting her wardrobe drawer.
Severus laughed, before walking over to kiss Sarah's head, said good night and then sauntered out of the room. Sarah climbed into the shower, letting the hot water and the smell of eucalyptus and mint from her soap ease away the tension she was feeling.
When she was done, she combed her hair placing it into a braid, and changed into her pajamas. She flicked on her radio, lowering the volume to a barely audible level, and laid down to focus on the lyrics until she fell asleep.
Meanwhile, Severus had gone downstairs and was dismissed by the Dark Lord after confirming that Sarah was safely in her room. Then he apparated to Grimmauld place to give Dumbledore his report, before he headed to the local pub. He felt angry at being forced to make Sarah fight by his side as a spy, and he was even angrier that her innocence was being dashed to pieces by her father's will for her to be the best of his Death Eaters and Dumbledore's insistence that she spy for the Order.
After four glasses of wine, he finally tossed the money onto the table and strode out, still disgusted at the way Sarah's life was turning out. He found himself growing worried that after all the hard work Sarah and her friends had put into being friends again, that they would walk away from her if they realized that she had anything to do with the breakout, especially Neville. Severus may not like him, but Sarah enjoyed his company and he knew that losing Neville as a friend would be a low blow for her.