Here's what Takami Satori knows:

Aizawa Eri is dead, lying in her arms after an overdose on Trigger.
Her heart aches at the sacrifice the older girl had to make.

"We don't have many options left anymore, and not much time left either. It's only a matter of time until Shigaraki manages to find this place without anyone fighting against him."

"If there's only one dose, how are we going to use it?" Satori asked, fearing the answer. "Nobody left has a quirk strong enough against the PLF, no matter how many times amplified."

Deep down, she already had an idea, but it seemed too extreme to actually be true.

Aizawa-senpai's eyes harden, and Satori can see the power of her quirk brimming behind her red eyes.

"Time travel," she says, and Satori would've normally laughed in her face if it weren't for the graveness of the situation.

"Your quirk is rewind, but it isn't time travel," she says, disbelieving. "Deku did an analysis on your quirk. He said that your quirk wasn't anything like time travel, it only reduces things to their previous state. There was only one recorded time travel quirk, and it only displaced people five minutes into the past."

"Deku wasn't wrong," Aizawa-senpai says, and Satori once again wants to scream at the girl because nothing Aizawa was saying was making any sense.

"Then how exactly are you, I don't know, going to use your quirk for time travel? It's not as if you can rewind the whole planet—"

"That's exactly what I'm going to do."

Satori goggles at the girl in disbelief. She couldn't be serious.

"There's no way—"

"That's what Deku theorized, yes. But before... before he died he told Hitoshi I had the capacity to rewind perhaps an entire city under the newer, safer versions of trigger. That was before my quirk evolved and made me more powerful. They didn't try it even though it could have been effective for reversing damage done by villain attacks. There were too many risks, especially to the memories and mental state of people, and I needed to focus my efforts on healing those who were injured fighting. There wasn't any time to test my quirk. But this dose, manufactured by Hatsume Industries before their collapse, is thousands of times more powerful than the one Deku based his analysis on. We don't have any other options."

They were surrounded from all sides, leaving them boxed inside of the building. The same nomu that had been targeting them before had managed to track them down.

Satori brushes pale blue hair to the side, but clenches her eyes shut at the sight of what the drug had done to the older girl.

Satori could only look in horror as Aizawa's veins turned black, her sclera as well. Satori saw the needle dropped onto the ground, the contents presumably in Aizawa's bloodstream by now.

"Hold onto me," Aizawa-senpai gasped, as black lightning began to crackle onto her body. Satori sent out a few feathers towards the nomu, sharpening them and lighting them on fire from a distance. She watched the creatures howl, clearly in pain as the feathers punctured their bodies, but kept moving regardless. She grabbed onto Aizawa, who's skin began to discolor as her hair rose up. Her horn suddenly started to emit a black ball of light, which she saw envelop the both of them in a sphere as the rest of the world was outside.

The howls of the nomu were no more, but she felt the world spin as her vision was enveloped in white, and Aizawa suddenly fell limp into her arms. She barely managed to wrap her arms around her senpai's prone body as the light overpowered her eyes.

When Satori had opened them again, she'd felt weak and defeated as she shakily stood on top of dewy grass. But looking around her, she saw buildings whole and tall, and there was a billboard promoting Wash of all people on the side.

There was a billboard promoting a hero in broad daylight to the public.

She felt herself break into hysterical laughter as she realized that what Aizawa did worked.

"Aizawa-senpai, it worked! You—"

She froze when she noticed Aizawa lay completely motionless in her arms, and wasn't breathing either.

Her skin was badly burnt, her horn nonexistant— and her eyes were entirely black.

She knew what Aizawa had taken was a suicide drug, but seeing her actual body in front of her made her sick. She hadn't been too close to the older girl, but she'd respected her and both of them had a comradery with each other.

"So, Izumi-san, huh?" She grinned, nudging Aizawa. Red eyes widened as her cheeks colored rapidly. The older boy continued walking, oblivious to the conservation happening behind him.

"Shut up," Aizawa had whispered quietly, slamming a hand over Satori's mouth. But it was hopeless. The perpetual blush on her cheeks around him betrayed her true feelings.

An ugly, heavy weight seems to fill her throat as she looked at Aizawa, pale and lifeless. She gently closed her eyes out of respect. Satori lays her body onto the grass, hovering protectively as she takes in her surroundings, eyes sharp and gaze wary.

She surmises that she was in an obscure woodland area near an apartment complex. The building her and Aizawa had been in obviously hadn't been built yet, judging by the grass that she was crouching on. It didn't look like there were many security cameras nearby, and the ones there didn't seem to focus on the area she was in. It must have been a stroke of luck that they wouldn't be in range of the cameras. How would she have explained her sudden appearance?

Looking down at Aizawa, Satori realized that she needed to do something with the body. It was a bit callous, but you didn't have time for such things out in the field. She didn't want to leave a body behind— the PLF was enough proof of what could be done with a corpse. Too many people had unfortunately learned that lesson the hard way.

Taking a feather, she placed it on Aizawa's body and stepped back, and willed the feather with her mind to spark. Blue fire erupted, covering the body as she quickly lifted up Aizawa's body with some other feathers to protect the grass from setting on fire. The last thing she needed was to start a fire and gain unwanted attention.

Satori watched as within seconds, Aizawa's body was quickly claimed by the fire. All that remained were ashes and her feathers. She quickly summoned them back into her wings, willing them to extinguish themselves.

Looking at the ashes, Satori thinks darkly about the similar fates of both Aizawa-senpai and her father, Eraserhead.

One cremated and the other decayed by Tomura Shigaraki himself, in a brutal public execution. That day had certainly destroyed morale, especially that of his remaining students. It had been one of the worst days in the history of the resistance.
One had been reduced to ash, while the other had been reduced to dust. It's a comparison she tries to get out of her mind.

Satori gently scoops up the ashes with her hands as she spots a nearby stream.
It isn't exactly ideal, but it'll have to do.

Carefully making her way, Satori slowly lets the ashes fall through her fingers and into the stream, allowing for them to be carried away by the water. It was safer this way for everyone, and she knows that this what Aizawa-senpai would've wanted, but she feels immense grief over the fact that Aizawa Eri, the most powerful healer known in recent history won't leave a legacy behind.

She'd been essential for her efforts after the death of Recovery Girl, had saved so many people—

Satori's crying, and she can't stop, as the tears come out unbidden and trail down her face. There's no one around to see her, but she curls into a ball and covers herself with her wings, hiding herself from the light as she sobs, alone in the past with nobody else.

She doesn't know much about this time period, never alive when hero society had been thriving and crime rates had been at an all-time low. She knows information, heard stories and tales and a lot of confidential information from the resistance, but she'd never experienced this time period for herself.

Satori's never known the luxury of peace since she was born, living in a world of chaos. Her dad had tried his best to shield her, to protect her, but the PLF had made that impossible for everyone.

She needed to accept the reality of the situation.

What would Dad say? she thought, imagining his face at the thought of her in a situation like this. He was always so overprotective of her, after all.

She missed having him preen her wings, helping her fly, and telling her stories about his life. She missed his fingers combing through her hair and practicing elaborate hairstyles he learned from a book Fumi-nii had gifted them.

Satori hadn't seen him since nearly 6 weeks ago.

There had been no time for breaks, and her father was essentially a civilian despite his years of being a hero. The resistance hadn't been able to afford losing anymore manpower, and she feels guilt as she remembered resenting his protests at her leaving and fighting.

It'd been easier to stay than to go back and hear his protests when she had to leave again. She couldn't trust herself to not fall apart at the fear in his voice.

Her dad had been essentially raised a child soldier, and he hated the fact that despite it being out of necessity, she wanted to participate in the battles between the PLF and the resistance.

They'd had many heated discussions about the matter, back when she was eleven and the resistance had been desperate and willing to overlook age.
Neither of them had backed down until Fumi-nii had intervened, promising that he'd look after her. Reluctantly, her dad had relented before making sure that she'd be careful.

Her father had always done his best to shelter her from the world that'd broken him, made him lose his wings and his whole purpose before he'd even turned 25.

She'd been born premature, he'd told her, and had always worried him since the day she was born. Her body had been very weak initially, and had been very prone to getting sick.

The day she awakened her fire is forever seared into her mind, the memory never leaving her despite the years that have passed since then.

The fear in her father's eyes as he'd stumbled back from her while she'd been confused.

"Look, dad," she'd exclaimed, excited. "I can make my wings all blue and fiery!"

Her father seemed lost, eyes glassy. She was confused at the lack of response. Why wasn't he as excited as her?

"Dad," she whined, not understanding his flinch as she moved closer. "Look, isn't it so—" she cried out, as the same blue fire burst from her arms as well.

"Dad, it hurts!" she wailed. He still looked dazed, back against the wall before screaming as he saw the burns on her skin while blue fire danced over her wings and arms.

The specialist had told the both of them later that only her wings and feathers could handle her fire, and that using her fire on the rest of her body would hurt her. She'd gotten away with minor first-degree burns, but after that incident she made sure to be cautious with her fire. The look of fear in her dad's eyes was forever burned into her memory.

Since then, he'd managed to conceal his reactions whenever she activated her fire. Satori actively made sure to train with her fire out of his sight. She did her best to ignore it whenever he flinched or his eyes widened at the sight of her fire, blazing as blue as her eyes, but she couldn't help the stab of hurt she felt whenever she saw it.

It wasn't fair that her father Dabi had left such a wound on her dad that she couldn't help but keep ripping it open. She hated him, hated how it was his fire and his eyes that made her dad feel fear in those painful moments, despite knowing how much he loved her.

Before leaving, her dad had stressed repeatedly the importance of being careful with her fire and heritage.

"Fumikage's the only one he knows," he stressed, "and don't tell anyone else about who your other father is. Not even Rumi. As far as others know, I had a one night stand with someone with a fire quirk."

Fumi had always made sure that she was careful, being her guide and mentor in the resistance even though he could've focused on the older kids. She remembered him assuring her dad that he'd always protect her.

"Dark Shadow and I will always protect Satori-chan. You have my word."

It wasn't exactly possible for Fumi-nii to continue upholding his word after being killed 8 months later.

Satori aches for comfort, for Dark Shadow to curl protectively around her or to feel the arms of her dad around her. She aches for someone to tell her everything was going to be fine. But she was all alone, in a world she'd only heard about and never experienced.

She didn't know how she was going to persevere, how she was going to survive in this time before the chaos that's made up her whole entire life has ever even happened.

Black spots appear at the edge of her vision, and the adrenaline fueling her for the past half hour vanished. Her limbs are heavy and difficult to move, and she feels herself wrapping her wings and limbs around her body even tighter as her head lies sideways against the grass.

She takes comfort in how her feathers can move automatically even if she's asleep, as her vision dulls. She falls asleep to the sounds of the water running through the stream as her hold on consciousness slips away from her.