Percy's story so far.

~Starting story~
 Growing up without parents is hard. Growing up on the streets after getting fed up with the orphanage is worse. After hearing Orphanage's staff call him insane, and a lost cause, causing Percy to basically run away. After a few years, he found a new home with a group of people who took pity on him. These people were a bunch of thugs, or criminals with some sliver of humanity left and wanted to live a life they didn't have to struggle.
At some point, the group had given him a task, steal a deck and duel disk from someone and use it as your own. It took a long time...but he felt a draw to a deck....and his mind clicked. A dragon deck would be cool, and so he stole a random deck and disk from a shop. A few days later a kid his age came to the group saying he was looking for his sister.
A few years went past, and he found himself in high school...bored out of his mind.
During that school time he had made a few friends, a few enemies, but most everyone had been fakers in his eyes. That was till a tournament happened. A tournament that changes his life forever.
The tournament had been pretty normal. 14 people from two different schools fighting each other in one on one duels. Sounds fun right? No... It wasn't. They all found out the hard way when each person who had lost began vanishing into dust. At that point, Percy snapped into leader mode and took charge only to have found his sister to have vanished. Fearing the worst. He went on anyway to protect those he could along with the group but his mind wasn't stable. After a few days had passed, they had learned that a group of nutjobs that came up with a plan to merge the physical and spiritual worlds into one.
He didn't get much time to think about it though when his sister had came back to take out another XYZ user named Yata. The teen couldn't let her drop that low and the result ended up having Percy vanishing his own sister with an OTK. There was no help....no warning... He had finally gone all out on the only person he cared about which broke his mind even further. He couldn't keep it up... But he had a theory. A theory that people had been moving into the spiritual world so he let himself fall victim to the clutches of a man working for them.

~Sum of during Shadow realm~
When he first woke the teen felt stronger. Much stronger. No tiredness at all. It had been like he awoke from a deep slumber after all these years. So he went..and searched. Searched those lands for any he could find. When he finally stumbled into people it had ended up being the ones who had been vanished. He had been right! The strange thing was that a ruined monster corpse had been there.

Sometime later Percy had learned that a person there had summoned a monster and it may have been possible for them as well. Before they could test it though, the world shook and all of them passed out. Several hours later and Percy awoke first to look around at the land having changed...and there were more people.. Never one to just hold onto things, he continued till he had seen his sister.

Some more time had passed and from the seems of it they had figured it had been at least a month. During that time they had figured that the worlds had mixed once more, they are able to summon their spirit monster along having been captured by monsters due to poor choices that drug everyone into it.
After having cleared things up they had explained a way to leave this world but at a cost. One or many would have hold the gatekeeper back enough for them to escape.

When the time came, Percy had summoned Galaxy out of her card. His look told them all. He was doing this and he wouldn't be stopped. For once in his life, he was doing something for others and not just himself. What happened next was nothing short of an all-out war with Percy on top of Galaxy at her full size battling out the guards. The land was destroyed by hot flames and the wind of the beast clashing. Monsters from all around watched the fight go on till BOOOM!!! The gate closed with the others behind it. Percy, knowing they had claimed victory even if they lose, ordered Galaxy to get them away as far as possible, which she had done. The guard didn't following having known he had won.

11 months had passed and during that first year Percy had started to change. Large blue eyes turned yellow and cold. His teeth had grown out more into fangs. His strength was growing by the day as well as reflexes having to fight for survival every day. Hunting, Shelter,  protecting, ANYTHING revolved around fighting here. His body had filled out pretty nicely as well but held many scars from fights which led to the teen coveting them up each day with bandages that he found from some group of freak scientists. This also helped with blending in. Sometime during that year he had gained a pitch black scythe and new clothing from different monsters here.

Time skipping to another year and he was well known. A lone warrior with a dragon at his side. The two were strong. Too strong. Strong enough to take on bosses that couldn't be touched before. They are will respected by most spirits there with some exceptions of fools who challenge them on the daily. He was known by a name...Photon Lord. It's the only way for a humanoid to be this strong! He had to be a number...right?

Sometime during the year the 'Photon Lord' had been visited by a man who offered him freedom of this place. In fact he had been turned down more then once...but the world was dying. Even he knew that so he finally went to the gate. It was time for freedom!