"Someone has disabled the main wiring. Should I bring up surveillance footage?" Peter and Shuri might have raced to say yes. The two were trying to get their minds off Willow in any way possible. Peter was wearing his suit under his hoodie and sweatpants, luckily. All he had to do was pull his mask out from his pocket, which was why he had a hand in his pocket.
  Surveillance cameras showed a girl with incredible aim throwing knives at the many cameras. She hadn't seen the back ups. Peter stripped off his hoodie, and pulled off his sweatpants, grabbed his mask and slipped it on. "Damnit! It was so obvious!" Shuri whined as she grabbed some rope.
  They came to the hallway, just in time to see the mysterious girl walk up the stairs to the roof. Perusing the possible enemy, they readied themselves.

They came face to face with the girl, who had half of a mask, much like that of the Winter Soldier's. Her black hair fell to her elbows, lining her pale skin and walnut eyes. Peter and Shuri exchanged a glance—one that confirmed who this was. Willow.

Peter didn't have proof, but he was sure he didn't need it. Sure, he'd need proof to bring the Avengers from their mission, but retrieving the mask should be easy enough.

He knew that room. He knew it like the back of his hand. "Thor, get your ass over here!" He called. Knowing his brother, he wouldn't take it seriously, but he would when he explained.
  "What is it?" His loud, booming voice was almost relaxing.
  "This is where they wiped my memory. They used this room. They wiped her memories." He didn't want to explain further.
  "Theres more. I promised myself that I'd try to be the brother I always should have been, so I will force your answer out of you, if it means to help get your friend back." He cared. He was trying. He was trying for him. He was helping. For him.
  "You'd have to endure at least a year of..."
  "Torture?" His brother's voice was soft, but he still couldn't utter his answer, so instead, he just nodded. Was she already... broken down?

He'd just heard the news, from Thor. His intern was experiencing something at home. His intern, was now an agent of HYDRA.
His phone rang, it was Peter. "Hey, Mr. Stark? Umm..."
  "Willow's memory's been wiped."
  "Yeah, we're having an issue with that on Stark Tower." He hung up, and shot away, the others who could fly following.

"Willow? Willow, do you remember me?" Shuri asked, still holding the mask.
  "Who the hell is Willow?" She growled, grabbing another knife from her pocket and hurling it toward Peter. It made it's mark on his shoulder. His Spider Sense had gone off, but he had ignored it. He knew she'd never give up.

That's where he found him. Where he found the fight. Where Peter was trying to reason with an exhausted—yet still fighting—Willow. Thor came behind her, and she fell into the ground, only just caught by the lightning god. Why she fell, Tony had no idea. Only when the Spider-child spoke up about 'powers' and 'half of her energy' did he have a slight understanding.

"She didn't know who she was. She just- she just kept fighting and fighting, and she never gave 'Willow' a second thought." The Princess informed the crew, who were sitting around Peter's bed in the medical room.
  "I saw her hand. It looked... burned. And irritated. She might not remember her name, but we owe it to her to fix that." Peter's eyes were filled with determination. There was no way he would be argued with.
  "Alright. I'll go check it out."

With Bruce gone, and Peter released from the med wing, what was left of the Avengers discussed what they knew of Sora's predicament. She didn't know who she was, and she hated the Avengers. They decided on letting Shuri drain any Winter Soldier serum–which was seen in her system in a DNA test– and try to talk to her.

"Hey."
  "You sound familiar." Her voice was laced with venom.
  "Is that a good thing?"
  "Depends. Who were you to me?" Shuri hesitated. Willow wasn't in the room with her. Willow was buried deep in this stranger's mind.
  "A close friend." Willow shifted to that. She had a blindfold on, they had known she might try something, like escaping. It also served as a mask, keeping the Princess' face out of view. She was able to sit across from her, and begin bringing her memories back. "What do you remember?" She held her non-hurt hand, and gave a light squeeze.
  "I-" Sora cut herself off with a gasp. "A- a boy. My age."
  "Do you know his name?"
  "Peter. He was my friend. And Mr. Stark... he was my boss? But Sam's my boss?"
  "Do you remember who was your boss first?"
  "Mr. Stark." She tapped her bandaged hand on the table as she learned to cope with the new information. "I like your accent, where are you from?" She asked, and Shuri responded with a vine.
  "I'm Librarian."
  "Oh, sorry," she whispered, "I like your accent, where are you from?" Shuri chuckled.
  "Willow?"
  "Yeah, Shuri?"

His friend remembered everything, and she'd still be kept in the interrogation room. With everyone knowing who he was now, he could just duck in and steal her, to save her.

He informed all the people who'd be in on it, and they formed a plan. Shuri would distract the Avengers, while Peter stole Willow.

She was sitting, when she heard the quiet scrape of the door open. The feeling in the back of her head—a feeling she had before being kidnapped, or that day when she was walking to the tower, and a HYDRA agent walked past—didn't go off. Not like it did for danger. Approaching. Do not attack. She didn't know it, nor did she have a connection to the not-speaking-voice, but Willow knew that it was the only one of her abilities that stayed.
  The sharp squeal of bending metal blocked all other noises, as her chains were grabbed in someone's hand, and she was lead out in a run. Someone had caught up, and they yanked the blindfold off, allowing sight of where she was running. Peter had her hands, bound in half-metre chain, in one hand, pulling her along through the back alleys of Manhattan. Her hair, which was now in a ponytail, swung to block her view, only succeeding at half.