Demon King of Britannia

Dying hurts. Being reborn into royalty can be even more painful, especially a royal family constantly trying to one up the others. Add in an encounter with an Ancient King and a rebellion in the East and life can only get more interesting.

And here we go with another OC insert story. You'd think I'd learn not to do this, but I just can't resist. For this first part, please note that I know very little about fishing, so I apologize for any inaccuracies. Now thats out of the way, lets dive straight in.

Chapter 1

I groaned as the sound of my alarm clock pulled me back to the waking world from the depths of slumber. I slammed my fist onto the top of the alarm clock and turned over, intending to sleep until noon, only for my door to slam open, revealing my roommate, looking ridiculously perky and dressed up like a fisherman, complete with the straw hat with fish hooks stuck in it.

"Up and atum!" he yelled, kicking the foot of my bed, "Todays the day!"

"Piss of Lucas, it's way too early for this!" I groaned from under my covers

"Ah ah ah, you promised," said the overly chirpy twenty year old, opening the curtains and letting in the sun, "I had to go to your lecture, now you have to come to my fishing trip!"

"At least mine had some relevance in passing Uni," I said, rolling out of bed, "Yours is just wasting time. I've got work to do!"

"Take your laptop," said Lucas, "Now hurry up!"

Half an hour and a breakfast of cereal later and Lucas and I were in his car heading out of the city to a lake to spend the day fishing. Unfortunately, since it was Lucas' car, he got to pick the music and picked out some god awful pop songs that always set my teeth on edge whenever I heard them and insisted on singing along, loudly and off key. In other words, pure torture. I don't think I've ever been more happy to arrive at a destination than I was just then, even if I would have to put up with the boredom that came from fishing. Still, I did promise Lucas and I always try to keep my promises, so I wouldn't complain...too much.

Two hours later and we still hadn't had a bite, Lucas was on his third can of beer and I was putting the finishing touches to my essay. It was at that moment that the heavens opened and started emptying an entire oceans worth of water onto us.

"Oh thats just perfect!" I groaned, "Can we go home now?"

"Are you kidding?" asked Lucas with a grin, "This will make the fish more likely to bite!"

I looked at him incredulously as he set up a large umbrella that covered the both of us before sitting down and opening another can of beer.

"Ah, this is the life!" he said, stretching his arms and closing his eyes.

"You have an odd definition of fun," I grumbled, reaching into the bag and pulling out a sandwich.

Before I could take a bite, a rumble of thunder echoed in the distance.

"Uh oh," I muttered as a flash of lightning lit up the sky, "Alright, now we definitely need to go."

"Why?" asked Lucas, "Its just a little rain."

"Lucas, there's a storm coming," I said patiently, "And you do know that fishing rods are basically lightning rods, right?"

"So?"

"So, unless you want to get struck by lightning then I suggest we pack up and go before the storm gets here."

Thunder rumbled to illustrate my point, followed by a lightning flash a few seconds later. Lucas looked like he was going to argue, but conceded my point. He may have a one track mind, but he's far from stupid. The two of us quickly began to pack up, packing up our half eaten lunch and Lucas' beer cans, as well as the bait and tackle box and our fold up chairs. Finally, we moved onto the rods and, looking back, I realize that we really should have started with that. It would have saved me a heck of a lot of pain, heartache and headaches in the future.

We were so focused on packing everything away that we failed to notice that the storm was now directly overhead. Lucas was taking down the umbrella was had been using, while I wrestled with the rods, trying to get them to collapse so I could pack them away. It was then that disaster struck. One moment I was packing the rods away and the next I felt like liquid fire had been forced into my veins and everything went black.

"GAH!"

I shot upright in bed, my limbs jerking in phantom pain from the dream. I sat their for a moment, wide eyed and panting as my heart rate came back into a reasonable range. As I sat their, a knock sounded on the door.

"Are you alright my lord?" asked a voice through it.

"I'm fine," I called back, "Just a bad dream."

"Should I go and fetch your sister young master?"

"No, I'm OK," I said, doing my best not to grit my teeth in irritation.

"Very well."

I flopped back down on my bed, before glancing at the clock on my bedside table. 8:30, time to get up. I got out of bed and padded over to the window, shoving the curtains open to reveal a view of large, colourful garden, before moving to stand in front of the mirror.

Rather than a 20 year old, scruffy looking university student, an 11 year old boy stared back at me, with short, dark purple hair and violet eyes. I was never really a religious or really spiritual person, but getting struck by lightning and then reborn soon cured me of that. Of course, the fact I was reborn into a world I know for a fact to be fiction meant that their was likely someone upstairs with a bad sense of humour. Whats that? You want to know how I know this world is fiction? Well, to answer that, I just need to introduce myself. I am Eren li Britannia, Tenth Prince to the Holy Britannian Empire. See what I mean?

With a sigh, I turned away from the mirror and started getting ready for the day, getting dressed in black trousers, a white shirt and a black jacket with gold stitching on the hems. Overall, the outfit probably cost as much as my student flat did in my last life. Ah, the perks of being reborn into royalty. Of course, that also came with a psychopath as a father, murder at every turn and an incoming rebellion from one of my brothers in a few years. Not to mention the stifling nature of the stiff protocols of being a prince, even if I was still under-aged. Bit of a balancing act really. Still, I'm not going to complain and make the most of the luxuries while I can. Don't give me that look, I'm only human.

I left my room and headed downstairs to the informal dining room where my sisters were already eating breakfast.

"Morning all," I said, sitting next to my younger sister, Euphemia who looked extremely grumpy.

"Good morning Eren," said Cornelia, looking over her paper, "Jeeves said you had a nightmare last night."

I shot a glare at the butler who was stood behind my older sister, only for the man to ignore me.

"Yeah, but I'm fine," I said, "It was just a bad dream. Nothing to worry about."

Cornelia eyed me for a moment, before nodding and returning to the paper. With that out of the way, I turned to Euphemia.

"So, whats got you so worked up this morning?" I asked.

"I miss Lulu and Nunna," said the ten year old.

I noticed Cornelia tightening her grip on the paper, although her face was still hidden behind it.

"Yeah, me to," I said, "Lelouch was the only one it was actually interesting to play chess with."

"What about Clovis or Schneizel?" asked Euphie.

I chuckled.

"I'm not in the practice of engaging in impossible battles," I said, "I'm all for a challenge, but I don't stand a chance against Schneizel. As for Clovis, hes never once beaten me, so theres no fun their either. I got no problem with playing Poker with them though."

I grinned evilly.

"Of course, they know better after I cleaned them out completely the one time they agreed."

Euphie giggled as Cornelia attempted to look disapproving, although her lips were twitching as she remembered the time I had challenged all of my older siblings to a poker game and proceed to clean them out completely. Since then, all of the Royal Children and many of the palace employees had called me the Card Devil after I won every hand we played and proved I wasn't cheating on top of that. I truly did have the Luck of the Devil.

I smirked and got to my feet.

"Well, now I've done my good deed by cheering up Euphie, I believe its time for training. Later."

I kissed Euphi on the cheek and hugged Cornelia before leaving the room and heading for the training room where I went through my brutal training regime to keep my skills sharp and strengthen myself. If I was going to help Zero in a few years I needed to be as strong as I could be. And that's exactly what I was planing to do. I was going to change the future and make sure that Lelouch got to experience the world he would work so hard to create alongside his sister and prevent many of the tragedies that would occur along the way. That was the reason I trained every day, increasing my strength and skill until I could defeat 10 of the Elite Royal Guards coming at me at the same time armed with just my training sword. Of course, no matter how skilled I was, I could never hold a candle to my tutor, a Knight by the name of Raffaello D'Arc, a woman of Italian descent who managed to kick my ass seven ways to Sunday every time we spared using just her left hand and without even moving her feet.

An hour later, I left the training room and promptly made my way back to my room to shower and patch up my many bruises Raffaello had given me.

"Looks like you got your ass kicked again," said a voice from the door.

I turned to see my older sister leaning against the frame.

"Yeah well, teach doesn't believe in holding back," I said, "Besides, its not like the damage is permanent. I'll be back to normal by tomorrow."

"Whereupon Raffaello will beat you to a pulp again," said Cornelia, moving into the room and taking a seat on my bed, "Why do you do it Eren? Why do you train so hard?"

I sighed and shut my first aid box, putting it on my bedside table.

"Because I get the feeling that this world is only going to get more dangerous," I said, "Last year Aunt Marianna was killed in her own home and the wars around the world are only getting more violent. I can't help but feel that one day I'll need to be a strong as I can possibly be to protect you and Euphie."

"What makes you think I need protecting?" asked Cornelia with a smirk.

"Brotherly instincts," I quipped, "But thats why I'm training as hard as I can, to make sure nothing happens to you two. I will do whatever it takes to protect you."

"Aw, thats cute, my kid brother acting all tough!" said Cornelia with a grin, showing a side of herself she only used around Euphie and I.

I grumbled and turned away, only to get dragged into a hug by my older sister and tickled into submission.

A few hours later saw me sat in a tree near the edge of the gardens around the manor we lived in, working on some designs and theories I came up with in my spare time. I had always enjoyed building new things and had found that I had a talent for working with Knightmare Frames. The designs I had were for new Nightmares and weapons that I would hopefully be able to build in the future. As I worked, I became aware of a strange feeling approaching, almost like a storm front but much more powerful. I looked up from my notebook and looked around. As I did, I caught a glimpse of a flash of red in the forest on the other side of the wall that surrounded the grounds. I stood up on my branch to try and get a better look, only for the limb to snap, dumping me on the other side of the wall.

"Ow, that hurt," I muttered, pushing myself to my knees and rubbing my head.

I paused as a pair of armoured boots landed in front of me and an aura of power the likes of which I've never felt washed over me. I looked up, taking in the being that stood before me. He was tall and well built, with close cropped, brown hair, blue eyes that practically glowed with power and His face was covered by a full beard that was neatly trimmed. He was clad in finely made armour with a white surcoat emblazoned with a rampant red dragon, a fine looking red cloak and a golden crown on his brow. In his right hand he held a beautiful sword with a blue wrapped hilt, a golden crossguard and a blade that shone like fire in the sun. The aura of power around him was almost suffocating seemed to manifest as a faint glow around his being, focused primarily on the sword in his hand. The man had an aura of a true King far beyond what my father had and that Aura forced me to kneel before the being.

"You boy, what is thy name?" asked the King.

"E-Eren," I stuttered as I struggled against the power that held me in place, "Eren li Britannia."

The Kings eyes narrowed.

"Where am I child?" he asked, "I woke here in these woods unable to find my way home."

"Y-you're just outside the city of Pendragon, Britannia's capital," I said.

The Kings nostrils flared and the aura around him seemed to increase.

"Your people must be extremely arrogant to name their city after the King of Knights," he rumbled, "Or extremely foolish. So which is it boy?"

I couldn't answer. The pressure the King was giving out was to much and it was all I could do to breath, let alone talk.

"I see, in that case…"

The King lifted his sword. In that instant, the pressure let up just a bit and I took advantage, throwing myself back to avoid the strike that would have removed my head had it connected, before flipping to my feet and sprinting off into the forest.

"Oh, it seems that you have some fight in you after all," said the King, amusement in his tone as he began to follow me, "Very well, let us play."

I sprinted through the forest, easily dodging around trees and bushes while trying to figure out exactly who it was who was chasing me and what in the world was the source of his aura. I immediately discarded some form of Geass since he hadn't had the symbol in his eye and that wouldn't explain why he was trying to kill me. I instinctively ducked under another branch and inwardly thanked Raffaello for teaching me so much beyond just swordplay. Then, my mind went back to one of my favorite Anime from my past life and a certain character in it that just so happened to look a heck of a lot like my tutor and my blood ran cold. There was no way the psychopath chasing me could actually be…

Before I could finish the thought, I was forced to dive forwards, avoiding the blade of the Kings sword as he came barreling out of the trees and took a swipe at me. I rolled back to my feet facing the psychopath as he straightened up and turned to face me. As he did, the tree that had been next to me when I dodged his strike fell over, cut cleanly in two by his sword strike. I gulped and eyed the weapon werally.

"You are fast young one, but no one can escape King Arthur Pendragon forever," said the King.

"CRAP!"

And that just proved me right. Apparently my luck had just ran out because I was now face to face with a Heretic God and he was out to kill me.

And thats where I'm going to end it. Hope you like it! Before I end it, a few points.

First, in this reality Godou doesn't exist, so he won't be killing Verethragna or anyone else really.

Second, I already have some ideas for Erens Authoritys, but I'm open to suggestions as to how I can improve them. They are as follows:

[Throne of Avalon]: Allows the user to command anyone who is a part of some form of military or law enforcement organization, as defined by the person himself. This is not the same as Lelouch's Geass as there are limits to what commands can be given. A person cannot be commanded to break their own morals, nor can they be ordered to betray their commanding officers through action, although it can be used to get information freely. The commands can be used freely and as often as the wielder wants, however a certain amount of time must pass between commands on a single person, with the more complex the command the longer the cooldown time. Orders can also be placed to activate at a later date if necessary and the limitations can be overcome at the cost of sealing the Authority for a night and a day.

[Excalibur]: Exactly what it sounds like, a Holy Sword with incredible power. This weapon can be used to burn away darkness and shrouds and the sheath can heal any injury. The worse the injury, the longer the Sheath will go dormant between each use. While in contact with the sword it is impossible to lie.

[Round Table]: This Authority allows Eren to gift a portion of his power to 25 individuals, granting them a portion of his Campione Vitality and enhancing any powers they may have, as well as their weapons and gear, including Knightmares.

I am also willing to accept suggestions for other Gods Eren could face off against in the future since I don't really have any right now.

Third, The 'God' of the Code Geass world isnt a 'God' in the same way as the Heretic Gods are. It would probably be more accurate to say that Heretic Gods are born from the Code Gods since they are born from Legends and Myth.

Fifth, I'm willing to take paring suggestions for both Eren and Lelouch from both worlds if needs be.

Finally, Eren is the same age as Lelouch.

Now thats out of the way, please leave me a review!