It was a strange dream to say the least. Most the time Eri would have nothing but nightmares. This time it was different.

This time she was standing on a floor that appeared to made out of clear blue water but was completely solid. There was a clear baby blue sky up above with a few fluffy white clouds here and there. The strange part though was the sun no where in sight and had no indicator to show where it was, it was just day time. It seemed to go on forever like this with the only deviation being th small group of people standing about ten feet in front of her only about a foot apart from each other, spread out in different sections. Each one of the people made her feel small, like they were all apart of something much greater than any normal human.

Most of them were facing her. They all wore fancy dresses or amor, each carrying different weapons with a variation of expressions masking their faces. The only one facing away from her was a young girl who only appeared to be a few years older than Eri herself. The girl was slender with silky white hair and wore a white dress and crown. Eri wanted to walk towards her but couldn't force her feet to move. The young girl looked over her shoulder as if sensing Eri's distress and stared at her with crimson red eyes that matched her own and smiled.

Eri couldn't help but be amazed by how similar yet different the two looked but couldn't think much about it before the floor turned to liquid engulfing them all in its cold darkness.

00000

"Are you Eraserhead?"

The underground hero looked up from his place on the floor in the hospitals lobby. He was told to stay at the hospital to keep an eye on its newest guest and was currently cocooned in his yellow sleeping bag trying to catch up on missing sleep.

The person standing above him was a nurse with short inky black hair and electric blue eyes that looked like they had data constantly being projected in the color of them, making it difficult to look her directly in the eye without getting distracted. She looked at the pro hero slightly concerned. He ignored her look, instead choosing to pull out a jelly pouch before answering with a simple "yes."

"I was told to inform you with any changes in the new patient." The nurse began as Eraserhead casually got out of his sleeping bag as if this was something normal. "Well there has just been a major change."

Eraserhead raised an eyebrow and signaled for her to continue as he followed her down the hallway to the young girls room, his sleeping bag tucked under his arm.

"My quirk is I can see any physical information of anyone I touch on the forehead with my index and middle finger. I just got here not too long ago, but when a fellow nurse took me to evaluate the girl we found her older then before wearing a different set of clothes." The nurse talked at a fast pace so it sounded more like nervous muttering them anything else, but Eraserhead was still able to keep up with what she was saying. She paused for a moment to look over at the heroes expression, but it remained completely emotionless. "When I did use my quirk on her the results were confusing. I wrote them down as I saw them but they kept talking about things like heroic spirits and servants. Not to mention the fact they gave more names then I have ever seen with any person before."

"I thought you said you could only see physical information?"

"I can. But it kept saying she was attached to others." The nurse responded as they reached the girls room bringing the two to a stop. There were quirks that could allow a person to merge with another, but those were rare and typically only allowed two people to merge.

"I want a copy of the information you gathered." The nurse nodded her head in response to Eraserhead's comment before she left down the hall after opening the door for the hero.

Eraserhead entered the room. It was your normal hospital room. White walls, bright fluorescent lights, a large window, a bed, and a few chairs for guests. What surprised him was the powerful aurora filling the room, giving him the sense of something greater then himself. It was an uneasy feeling he had to force down as He walked towards the unconscious figure in the bed.

He looked down at the girl who was still past out on the hospital bed. When they had first found her she was around the age of six with white hair and red eyes as well as a small horn on the right side of her forehead. The girl had the same hair and eye color as well as the same small horn, but she looked a few years older then before and was no longer wearing the hospital clothes. Instead she was wearing a white dress that had a bit of red and gold here and there and a white crown sitting skewed in her head. The dress looked somewhat simple, but Eraserhead felt like the dress was worth more than his whole salary.

After a long moment, the hero was unable to tell if it was the dress giving off the strange aurora or the girl. It would make sense for the girl to be the one responsible, but there was a strange gut feeling that made him believe otherwise despite the fact it would make no sense.

He thought for a moment, pocketing this information before activating his quirk. Right away the dress slowly started to fade into a faint golden light before vanishing from sight, being replaced with a normal hospital gown. The girl stayed the same though instead of going back to her previous state which he had been hoping for. It would have had his job easier, but he never had such luck.

"I have the file."

The high pitched nervous voice of the nurse caused Eraserhead to look back at the door to see the same nurse as before, but this time holding a small office folder. He took the folder from her, thanking her as she left.

The hero sat down in one of the bedside chairs making himself comfortable before opening the file to read.

NAME(last,first): unknown
AGE: 15
GENDER: Female
BIRTHDAY: unknown
HEIGHT: 133cm
WEIGHT: 34kg
QUIRK: Demi-Servant Sitonai? Pseudo-Servant Sitonai (previous)? Heroic Spirit Sitonai? & rewind?
FAMILY: unknown
NOTES: Combined with self from this world
Past lesser grail
goddesses - Sitonai (Ainu), Louhi (Finnish), Freya (Norse)
Attached to Heroic Spirits/unusable (inactive) - Hercules (Berserker), Artoria Pendragon (Saber), Emiya (Archer), Cu Chulainn (Lancer), Medea (Caster), Medusa (Rider), Gilgamesh (Archer)
Possess Dress of Heaven
Strength:E
Endurance:D
Agility:A
Mana:EX
Luck:A
Noble Phantom:A

The nurse hadn't been lying when she said the results were confusing. The information made no sense and left far too many questions compared to information. Some of the names listed, he could recognize, but names afterwards made no sense as well as the "attached to heroic spirits" part of it.

Eraserhead couldn't figure out the information himself and did the only sensible thing he could think to do. He walked out into the hall to make the phone call, keeping the file in hand.

"Hello Aizawa." Came the chipper voice of his boss. "Is there something I can help you with."

Nezu was originally part of the case, but since his quirk made him smarter then humans, the pro figures he was the best to call. He knew he should have ran this by the police first. He wasn't too worried about it though, they already had all this information before Aizawa did and Nezu was good at finding loop holes with legal stuff.

"Yes. It's about the most recent case I've been working on. There's information on the child we rescued, but I can't figure most of it out."

It wasn't often Aizawa asked for help. He preferred doing things in his own, it was typically easier that way, but this time he made an exception.

"Can you send me the information and please refrain from moving forward until I get back with you."

With that Aizawa ended the call, sending Nezu a picture of the file.

00000

When Nezu said he would get back with him, Aizawa didn't think he would personally come down to the hospital with both Present Mic and Midnight in tow. The three came waltzing through the door and up to Aizawa when he was having a conversation with Tsuragamae Kenji, the chief of police. He was a person with a normal human body, but the head of a dog. No though much about it. Quirks caused many different mutation, Aizawa once even ran into a man with a cacti for a head. Not to mention having the head of an animal was something quite common among the police force.

Of course Aizawa had informed the chief of police about calling Nezu, though he did word it like he was asking permission before he did the act rather then after. He didn't want him to get mad and take him off the case for taking action with permission.

"Hello Officer Tsuragamae." Nezu began in a chipper voice. "After reviewing the information I was hoping that I could talk with the girl personally with Eraserhead. Is she awake?"

"She woke up about ten minutes ago." The chief of police confirmed before giving him permission to talk to the girl, ending his statement with a small "woof."

Nezu easily transferred from Midnight's to Aizawa's shoulder. As the two walked down the hall to the girls room, Aizawa told Nezu about any additional information he knew.

The girls name was Eri von Einzbern, granddaughter of the villain Overhaul. She hadn't given them the full story yet, but said she would tell Aizawa the full story later. He didn't fully understand why she would tell specifically him the full story but wasn't going argue if it meant getting more information.

When the two entered the room, the girl, Eri was reading a book one of the nurses had given her as well as eating what appeared to be sliced apples. She had bandages covering both her arms though there was no report of any injury besides scarring which had been present before they found her.

"Hello Miss. Einzbern." Nezu greeted causing the girl to look over at the two heroes standing in the doorway. "Do you mind if we ask you a few questions?"

Eri gave the two a small nod. She seemed slightly out of it as if she was still recovering from a daze. The two sat down in the chairs beside her bed and Nezu couldn't help but be a little surprised by the girls appearance. She looked younger then fifteen and far too calm for the situation she was in. It could very well have been shock, but that didn't seem like it was right.

"To start off your name is Eri von Einzbern, correct?"

Eri looked at the small animal next to her bed, slightly tilting her head to the side like a young child. "That's both a yes and no question."

Aizawa raised an eyebrow at the response, prompting the girl to explain as Nezu carefully listened to everything she said.

"My original name is Illyasviel von Einzbern. I was a mage and vessel for the lesser grail, but during the most recent grail war ,grand order, and accident happened causing me to combine with Eri or Eri to combine with me. It was possible because we're apparently the same person. We're each other from different worlds. I have her memories and feeling and she has mine because they both belong to the same person. We're no longer separate and can no longer be separated because their is no longer two of us. So from now on I'm Eri von Einzbern, but you can also call me Sitonai."

"Why Sitonai?" Aizawa questioned. He had a billion others but decided to start with the basic ones. Nezu had stayed silent letting Aizawa ask the questions as he observed, making it more difficult for Aizawa to know if he was heading in the right direction.

"During the last grail war I became the Pseudo-Servant Sitonai. It was a servant made from the power of three goddesses, now that seems to have become my quirk along with my old rewind powers. It's called Heroic Spirit Sitonai."

"Please explain by what you mean Pseudo-Servant and being a vessel for the grail?" This time it was Nezu who spoke.

"The grail war is a war started when three mage families attempted to summon the holy grail, an ultimate wish granting device. The grail would only grant one of their wishes so the group decided to battle over it, each one of the three families providing something. This was the start of the Holy Grail War. There are seven participants who each summon their own servant, one from each class. Saber. Archer. Lancer. Rider. Caster. Assassin. Berserker. These were spirits that belonged to ancient legendary heroes called heroic spirits." The names on the file made more sense to the two heroes now. They were the names of heroic spirits and their class. "Once only one of the heroes were left standing the greater grail would reveal itself. The Einzbern's were responsible for providing the grail. I was a vessel for the lesser grail which would later manifest to become the greater grail once six heroic spirits were killed. This changed though. There was another Holy Grail War I was involved in. This one was on a much larger scale with more heroic spirits then one would care to keep track of. Someone was messing with the past, and we were going back trying to fix the mistakes. That doesn't seem to be the same place I'm in now though. I can't sense any mana here. It seems to have been replaced with something else and in this place the grail appears to be nothing more than a myth, though I'm not sure how I know."

"And Pseudo-Servants?"

"Pseudo-Servants are heroic spirits who can't be heroic spirits for one reason or another so they possess a human vessel and become a combination of that person and the servant. For example I was the Pseudo-Servant Sitonai. She was a servant made up of the power of three different goddesses. Sitonai was the most prominent, but you can't really call it just one of them. Now rather that power being called a Pseudo-Servant it seems to have became a part of my quirk."

The three of them sat quietly for a short period of time after that, both Aizawa and Nezu processing the information. It was a lot to take in. It sounded like a made up story a child would tell you, but there was so much evidence to back up what she was saying. There was the file. The change in her age. And that dress she was wearing.

"You were fighting to protect the world before this happened, correct?"

Eri looked over at the small animal as if trying to figure out what he was getting at. It technically was true. During the first war she took part in she wasn't, but now she kind of was.

She gave Nezu a small nod, still slightly confused.

"Lets make a deal then." This time it was Aizawa that gave him a questioning look. "I am the principal of U.A., a very famous hero school here in Japan. I'll let you take the entrance exam for the hero course. If you pass we'll help you with whatever path you choose to take next as you train to become a pro hero. Deal?"

There was a look of surprise on Eri's face. It wasn't what she was expecting to hear. She wasn't sure what she should do, after all she had done some pretty non heroic things in her life and she wasn't fully sure what she even wanted to do next. She sat there thinking about it for a second before looking back at the small animal.

"Deal."