CyberActors15: Hey fellas, welcome to my newest story. This is gonna be a quick little info dump. First of all, this is an Isekai story where a person who may or may not be based on me is resurrected as Byleth. So Byleth will feel like a completely different character because of the personality of the person who reincarnates into him. If you are a traditional Byleth stan then you have been warned. This story will also draw inspiration from Three Hopes as well as Three Houses. Might even toss a little Engage and Heroes in if I see fit. Also, this story will switch perspectives a few times. Sometimes it'll be in 1st person and other times it will be in 3rd person. Also, happy Time skip every one. It has been exactly 5 years since Fire Emblem Three Houses was released and I wanted to make this fanfiction to celebrate. Anyway with that out of the way, I hope you enjoy it.

Chapter 1: Resurrection

Dying was a lot different than he thought it would be. There wasn't any pain, only numbness as he felt his consciousness fading. He could hear but it was like he was underwater. He could see but everything was blurry. He could barely make out the doctors and nurses scrambling to keep him alive but even he knew it was futile.

The only thing he could make out was the heart monitor's beeping. It wasn't steady. Beep. Beeeep. Beep. Beeeeeeep. The beeps were getting longer and his heart was failing him. It was weird. For the past two years, he had heard that heart monitor every day and now it would be the last thing he heard.

The young man watched as the beeping became longer. His vision faded as that last beep played and a continuous line appeared on the monitor. No denying it now. He was dead… But his consciousness was still around?

To his surprise, he could still think. Somehow his mind floated in a room separate from the hospital room where he'd spent the past two years. He couldn't see anything at first until he heard a voice.

"Oh my, what could have brought you here?" A familiar voice said.

He turned and to his surprise, he saw a girl with long green hair, green eyes, and elvish ears sitting on a throne.

"Sothis?" He asked even though he lacked a body.

The girl on the throne faded away from view and he found himself in another room and in an infant body. He stared at another familiar woman as she held him in her arms. She was crying.

There was a hole in her chest as the last of her life seemed to fade away but despite that, she smiled. He recognised her of course. She was the mother of a video game character?

"Sitri?" He asked but his voice was different. Younger as if it belonged to a baby. The woman stopped crying and stared at him.

She stared in awe and she gave one last smile before she too was claimed by death. And as if noticing the death of his mother, the baby began to cry as well. He couldn't explain why he was crying as well. It shouldn't have been him crying and yet he cried just like the baby.

The memory faded again and he found himself standing out in an open field in front of some training dummies. He was in the same body but now it was older, maybe around five years old or so. He also held a wooden training sword. There was a familiar man with him with dirty blond hair and a beard.

Something about this man seemed safe and familiar as if he were looking at his father. Wait. He was looking at his father? And he was training him how to use a sword. That made sense, his father was born in the Holy Kingdom of Faerghus. And in the Kingdom, children were trained to use weapons from an early age. Wait Faerghus? But that was a fictional country in a video game, how could his dad be from Faerghus?

Before the boy had a chance to question this, he was pulled from this memory.

~00000~
Byleth POV

"Happy birthday kid!" I heard voices all around me call out.

I shook my head of the feeling of vertigo and found myself in a tavern. For some reason being in a tavern didn't feel weird at all even though I had no reason how or why I would be in one.

Wait no I did remember. We had just finished a mission for Vicount Fenja. It was a simple security escort mission. Dad didn't join us for today's mission which made sense, today was the 20th of the Pegasus Moon after all and he was always drinking by himself on the 20th of the Pegasus Moon. And so I had been invited by one of the mercenaries, Bertold, to go drinking with them.

Wait what?

"Uh, thanks," I said as I looked around. "How did you know?"

I don't recall telling these guys my birthday but somehow they knew. Pegasus Moon was February. That was the same birthday I set for myself whenever I played Fire Emblem Three Houses. I paused, suddenly aware of my voice. Why did I sound like Zach Aguilar?

"I bugged the captain until he told me," Bertold admitted. "I thought throwing you a party might get you to smile once in a while."

"Thanks for the party," I responded with a smile much to the surprise of everyone around me.

"Goddess it worked!" One of the other mercenaries, a lady named Annie responded. "The Ashen Demon can actually smile."

Ashen Demon. Yeah, I remembered that nickname. It was the one Byleth was given in Fire Emblem Three Houses. And I was being referred to as the Ashen Demon. I seemed to have memories of people calling me the Ashen Demon, but those memories were different from the memories I had before I died. Despite that, they also felt like my memories… Wait, yeah I died. I was in a hospital room and now I was here with new memories that I didn't recall making. Had I been reincarnated?

The mercenaries around me quickly broke into chatter. Some of them spoke about my miraculous smile while others talked about the mission we had just completed. They were a rowdy bunch. I noted almost immediately that they all looked like they were in their thirties. A quick scan of my memories told me I was probably eighteen years old.

One of the mercenaries, Reiner, sat at the table in his early forties. Another scan of my memories told me that he was the oldest mercenary to join our group. When I was a child he was the first person who joined Dad's mercenary company. Wait, Dad? At the thought of my father in this life, I imagined an incredibly strong blonde man with a scruffy beard, in orange clothing. Just thinking of him I could feel my memories jumping up to the surface. He was a little strange, wasn't great at showing his affection and had a severe drinking problem but he was my dad. And he was Jeralt Eisner the Blade Breaker.

The Blade Breaker was my dad? And I was the Ashen Demon? My name was… Byleth Eisner? Wait a minute.

"I'll be right back," I said as I stood up quickly and made my way away from the table.

As I walked I realised I had been in this tavern before. Just before we had accepted the Job. This tavern was in the Viscounty of Fenja and was considered a good place to go and find jobs for Mercenaries. It was here that Dad and I met a servant of Viscount Fenja and were offered the security job.

Because I knew this place I could find a restroom easily enough to confirm what was on my mind. And I saw it as soon as I looked at a mirror. I saw a mop of blue hair and dark blue eyes. Reflected in the mirror was my face but also the face of the protagonist of my favourite video game. I saw Byleth's face.

"Ain't no way," I commented bringing my hand to my face.

My face felt real. The skin colour was different but the skin was mine. My hair was real as well. It wasn't a wig. I wasn't wearing coloured contact lenses. Those were my real eyes. This wasn't some elaborate cosplay. This was my real body. Somehow I had changed from an anorexic guy in a hospital bed to a physically fit video game protagonist.

"Did I really get reincarnated into the game?" I muttered to myself.

Just before I got sick in my past life. I had just gotten a Nintendo Switch. I only had two games, Fire Emblem Three Houses and Fire Emblem Warriors Three Hopes. By the time I was stuck in the hospital, playing the game daily was my usual method of passing the time. When I played both I usually chose female Byleth as my avatar, so I was surprised that I had been reincarnated as Male Byleth. But considering I was a guy beforehand, I suppose it made sense to become a guy in the next life.

Anyway, I played both to completion multiple times. I sided with the Eagles more times than I could count but I also sided with the Lions and the Dear more than a few times. Repeated playthroughs of both games lead me to become a master of the lore and story. But I never once figured that I'd end up living within the universe.

I was Byleth! I was actually Byleth Eisner! I was the Ashen Demon I could… Oh shit, I was Byleth!

I was suddenly aware of where I was. I was in Fódlan. In the Adrestian Empire. Edelgard von Hresvelg was a real person. As exciting as that might have been, if my age was any indication, she would be undergoing experiments and being turned into a weapon that hated the goddess. Dimitri Alexandre Blaiddyd had or would survive the tragedy of Duscar and develop his Boar Prince Personality. Claude von Reigan was somewhere in Almyra dreaming of uniting Fódlan and Almyra. And I, in three years, would be forced to choose a side. Help Edelgard free Fódlan from the Central Church's rule? Help Dimitri get revenge for his Family? Help Claude break down the walls between Fódlan and the outside world? Or help Rhea stand up to the tyrannical emperor who waged war on the world? I was suddenly aware of the fact that I would have to choose and I wasn't sure I could choose.

I deflated suddenly realising that this new reincarnation might end up being more stressful than I thought.

I looked back into the mirror one more time at a loss of what to do. This was different when it was real life. This was easy when it was a game and I had to choose. It was easy to choose Edelgard's side. Philosophically I liked her desire to be free from the Central Church's control. Rhea was sketchy on a good day and downright terrifying on a bad day. I read the lore. I invested fully in the story. Rhea was a control freak who dictated the path of Fódlan. She actively participated in human experimentation, and silenced and killed whoever disagreed with her doctrine for her Church of Serios and in the Crimson Flower timeline she would set Fhirdiad the Kingdom Capital ablaze just to halt our movements.

But for all her faults she wasn't as bad as Thales. She had secured a period of peace for almost a thousand years. She actively helped people like my father, Catherine of house Charon and Cyril a boy from Almyra. And Edelgard, as much as I enjoyed her philosophy was far from perfect. She was just as flawed with her trust issues and blamed every little thing on the Church. Choosing between the two of them would be even more difficult now.

I agreed with the philosophies of Dimitri and Claude as well but Dimitri tended to lose himself in vengeance. And Claude? The boy was as sketchy as they came with the same trust issues that Edelgard had. I sighed wondering why they all had to be morally grey characters.

"I can't believe I'm saying this but can't the four of you be like Marth?" I groaned.

~00000~

Sometime after the party at the tavern had ended I found myself standing outside while looking up at the moon. I was considering my options and found myself at a loss for what to do. But I had an idea. So I made my way away from the tavern and away from any prying eyes and ears. It probably wouldn't be a good idea for people to see me talking to myself.

Once I was sufficiently far enough away I sat on the ground in a meditative lotus pose.

"Hey Sothis, are you there?" Byleth asked.

I didn't get a response immediately so I pushed again. I projected my voice inward and tried to reach the girl who slept on her throne. The longer I tried the more I felt a presence responding to mine.

Eventually, I felt the world around me fading away from me and as I opened my eyes I found myself in a large empty room. I knew exactly where I was. The moment I saw the green tint to the stone walls and throne, I knew I had reached the dreamscape of the Holy Tomb. Sothis sat on her throne yawning as she woke up.

"I wonder how you got in here," She muttered with a yawn. "It is most rude to interrupt a moment of repose. Very rude indeed."

"I never thought I'd ever meet you," I said. "Sorry for waking you up but I wanted to talk to you. Sothis."

"Hmm. Sothis," She commented. "Yes, I was once called that before. I was also referred to as the beginning. I wonder who called me that."

"You don't remember who you are, do you?" I asked.

Sothis paused and stared at me.

"No, I don't," She said. "I can't recall anything save for my name and I couldn't recall that until you said it. Tell me who are you?"

"I'm… Byleth Eisner and I guess you could say we're connected," I responded.

"You hesitated," Sothis noted. "Are you not who you say you are?"

"I am kind of," I said. "It's a bit hard to explain."

Sothis leaned back on the throne as she adopted an expression of curiosity. She smiled as she gestured for me to share what I knew.

"Well it's a bit complicated," I began. "First I'll start with you. You are the mother of a woman named Seiros. You were once a powerful divine dragon who descended upon this world and brought the Nabatean race to Fódlan.

"As for me. I'm a person who died and was reborn in our shared body," I explained. "Well, my body. You're kind of like a permanent tenant. Anyway, just like you descended from the Blue Sea Star, I came from another world and shortly after I was born your daughter, Seiros found a way to resurrect you inside of me."

Sothis listened intently as I spoke. I explained the basic nature of the things that I knew. I explained the basic nature of her existence as a Divine Dragon and my experiences back on Earth. She never once interrupted me but nodded her head along as I spoke.

"It's quite a fanciful story but I can't help believe it," Sothis said. "Seiros, I don't have any memory of her. But you know her because you saw her story in a… what was it… video game?"

"Yeah," I said. "I know how her story ends and the effect she had on the stories of others in this world."

"And you don't want these others to meet an unfortunate end?" Sothis asked.

"You guessed right," I said.

"As you told me your story, I got the impression of memories. I saw a white-haired arrogant girl, a blond boy with a righteous soul and a damaged heart and a brown-haired boy who seeks peace," Sothis said. "You hold these three and several others in high regard even though they weren't real until now."

Sothis seemed to stare right into me with curiosity. It made sense, in the game she and Byleth were inextricably linked. What your protagonist wanted was also what Sothis wanted so I had a feeling that she was able to see what I wanted.

"Why?" She asked.

"In my past life I didn't have a lot of real friends," I answered. "I always found it easier to relate to fictional characters than real people. And when I was in hospital, this game got me through the last two years of my life.

"Now It's real. I don't know for certain everything will happen just like it did in the game, but my favourite characters are real people and I don't want to see them die when I can avoid it," I answered as I felt a feeling of resolve wash over me.

Sothis smiled.

"I don't know everything that you've experienced but I want to help you," She said. "It's strange. This is all new to me but we share the same wish as if we shared it for years."

~00000~
3rd Person POV

"Hey kid, what're you doing sleeping in a place like this?" Jeralt asked as he shook Byleth awake.

The older Eisner male found the taste of liquor didn't satisfy him as much this year as it had the past couple of years since Sitri's death so he decided to call it quits early and return to the rest of his mercenary company. He hadn't expected to find Byleth on his own sleeping in one of the farms of the village.

"Oh hey sorry about that Dad," Byleth responded with a sheepish smile. "I was uh… just thinking and I may have gotten too comfortable and fell asleep."

Jeralt paused as he stared at his son. He would be the first to admit that he wasn't the best parent out there. In raising Byleth he made so many mistakes that Sitri wouldn't have made had she survived to see him grow up. But that didn't mean he wasn't observant of his son's actions and habits. This was the first time Byleth had ever called him dad. This was the first time the boy smiled sheepishly and didn't speak with his usual monotone inflexion. In that simple sentence, he had been far more expressive than he had ever been.

That was odd but he didn't question it. Maybe that surprise party was more impactful than he had thought. That couldn't be it, right?

"Try not to fall asleep outside. Even in the Empire Winter can be harsh," Jeralt added.

"Got it," Byleth responded as he stood up.

The two made their way back to the tavern in silence. This was normal with Jeralt taking the lead and Byleth following. The silence didn't last long though as Byleth decided to speak up.

"Can I ask you something?" He said.

"What do you need kid?" Jeralt asked.

"Sorry if I'm being forward," He said with an element of reservation that Jeralt hadn't seen before. "But did my mother die the day I was born?"

Jeralt froze.

"Sorry, it's insensitive. But I've noticed that you always go drinking on my birthday and leave me with the others," Byleth said. "I wondered if you blamed me for Mom's death."

Jeralt sighed. He had always hoped to avoid this conversation. Maybe he should have stayed drinking but it seems like today the conversation was inevitable. He knew he should have been truthful about his feelings before but if he were being honest, his grief still blinded him. He had been alive longer than any person, except Lady Rhea, and in that time he had only found true love once. And for that love to be taken away from him left an emptiness that he tried to fill with violence and drinking.

"She died on the 23rd of the Pegasus Moon 1159. Three days after you were born," Jeralt finally said. "She held you in her arms each day hoping you would live. When you were born, you never cried and you didn't have a heartbeat. And we were worried you wouldn't live for long.

"One day you started crying but that was the day she died," Jeralt added. "I never blamed you for her death kid. I guess I've always been running away from what happened to her."

"Sorry to make you remember that time," Byleth said.

"Maybe I've been avoiding talking about her for too long," Jeralt said. "How about this, you're a man now. How about I tell you about your mother over a few bears."

"No thanks to the booze. It's not a good idea for the both of us to be inebriated," Byleth deadpanned. "But I'd like that chat about mom."

"No drinking, alright," Jeralt agreed with a smile.

~00000~
Byleth POV

As I sat with Jeralt, talking about the mother I never knew I felt Sothis stirring in the back of my mind.

"So why did you remind him of his sadness if you knew this information already?" Sothis asked in my head.

"I didn't know all of it," I responded. "I didn't know she died three days after I was born. I always thought Rhea took the crest stone the day I was born.

"But I wanted to see if things could actually change," I added. "In the original game, Dad only tells me about my mom when we've been at the Church for a few months. But with a bit of prodding, I was able to get him to tell me early."

"Ahh! I see. You are smarter than you look!" Sothis said.

"Thank you! Hey!" I retorted.

I was met with a giggle of amusement from the goddess inside my head. I decided to tune her out and continue listening to Dad's stories. There might have been information that I already knew but I was definitely learning a lot. I couldn't help but smile even if it felt weird with this face.

Not only did it feel like a small missing part of me was being filled in but I also had hope that I could do this and save everyone.

CyberActors15: And that is the first chapter of this fun Isekai wish fulfilment story. Not much to say here. I hope you enjoyed the chapter. As I mentioned Byleth would have a starkly different personality which will be highlighted further in later chapters. So yeah. I hope you guys enjoy this story. If you enjoyed this chapter, feel free to leave a review also check out my Linktree ( /CyberActors15) for more of my story content. If you didn't like it, feel free to leave a review and tell me why. Feedback is always appreciated, and criticism only makes me a better writer. Until next time, peace!