PJO x AOT crossover

Chapter 1: found

A/N: Hey guys. This is officially chapter 1. I have decided to add Dc to this story, cause the. I can make CADMUS find her. She will be found during the mission where YJ finds superboy.
No one's POV
Cadmus has just made an extremely important discovery. In the middle of the South Indian Ocean, they found what seemed impossibly like a giant iceberg, but it wasn't made of ice. It seemed to be made of a material harder than diamond, and organic.
When they used a submarine to see the bottom part of this "iceberg" they found a body of a giant in the iceberg. The material seemed to have come from the giant's body, almost as if it was trying to protect itself. The giant seemed to be female, with armour covering most of her body. What seemed to be weird was the fact that there was a body protruding out of its nape, with strands of muscles connected to her eyes and body.
They managed to somehow fish the thing out, and brought it to the lab to be studied. They deemed the giant as the armoured giant, and built a giant underground lab under one of their Cadmus labs in Gotham to study it.
Time skip
The scientists at Cadmus weren't able to find anything about the subject, other than the fact that the thing came from thousands of years ago, which didn't line up with the fact that the woman was wearing 20th century-era clothes, which shouldn't have been possible.
What they were able to do was extract a sample from the thing and confirmed that the material the "iceberg" was made from some organic material, which they guessed was the same material as the armour the giant was covered in.
Time skip
We were eventually able to extract the woman out of the giant's neck, and found that a few minutes after we took her out, the giant evaporated and just disappeared. However, we were able to study the girl, and determined her to be around 12 years of age.
From our research, we were able to determine that she was from a few thousand years ago. We cut her skin, which healed quite fast, revealing that she had some sort of regenerative ability.
From our research and observation, we concluded that the girl had the ability to create a Titan form and control it, had regenerative abilities that could be linked to her Titan form, and that she was from a very advanced society that existed thousands of years ago.
Time skip
Robin's POV
Despite our mentors' wishes, we still decided to go ahead with our plan to investigate Cadmus. While going down the lift, we were able to find a gigantic lab that housed various test subjects. While walking through the lab, we found a chamber holding a girl about 11 years old, held in suspension in a container of liquid.
According to the sign next to the container of liquid, she was labelled as "project Titan". We were able to free her, but when she got out, her eyes were still closed.
We asked Kid Flash to get her up to the surface quick, while we continued to explore. We later found superboy and brought him to the surface. When we reached the surface, we found the Justice League trying to calm the now conscious girl down.
Before any of us could react to stop her, she jumped back, and taking a knife, she cut her hand, causing a sudden flash of yellow lightning.
When the smoke cleared, in her place stood a towering Titan, with was about 15 meters tall. Superman tried to fly up to her, but she swatted him away before running away.
"What the heck just happened?" Wally asked us in shock, unsure of what to say. "She's in shock. I don't know why, but when I looked into her mind, she was constantly thinking of some walls." Martian Manhunter replied.
"Whatever's the case, we need to find her before she causes any damage. We don't know what she is capable of." Batman replied.
We chased after her, following her path of destruction to Gotham Harbour, where we found her staring across at the sea.
When we reached her, superman flew up to her, only to find her attached to the nape of its neck. She managed to detach herself, and superman carried her down. By the time she was on solid ground, she fainted, probably due to exhaustion.
Time skip
Perci's POV
I woke up in an unknown room, with no clue to where was. All ai remembered was that I was sent to the ground during the fight against past Titans on Eren's body, but everything after that was hazy.
Just then, a man in a blue and red suit, a man dressed as a bat, a man in a red suit, a guy with a green suit, and a man dressed like a bat entered the room. I did not know why, but something in my head told me not to trust them. I was going to prick my finger with my ring, but the man in black stopped me.
"I suggest you do not do that. You're stuck in outer space, where there is no oxygen, and blowing up this place isn't a good idea." He said. "Why not we ask you some questions, and you answer them."
"Considering that I have no other choice, then yes." I replied reluctantly. I had no choice but to agree.
Time skip
Batman's POV
From the questions that we asked her, we found out that she was from the year 855, and that she had been knocked out when she was sent to that ground during this "rumbling".
However, what baffled us was that what she had described was not in any of the history books, as per human knowledge, humanity was not that advanced during that time.
When we did a blood test on her, we also found that half of her DNA was missing, just like Wonder Woman. This meant that she too was a demigod, who somehow had knowledge of the world that was unknown to us.
When we asked Diana about this, she said that she had no idea of what she was talking about, and that the Amazon library had no record of such events either.
Considering the information that we had gathered so far, we could only assume two thing; she was from a parallel universe, or that someone had deserted the universe, making sure that no one had any memory of these events.
We then decided that since the girl was a demigod like Diana, she would be trained under her and become her protégé.
Walking into Perci's room, we asked her if she would like to become Diana's ward, and she said yes.
Perci's POV
Knowing that my family was dead, I decided that I would need someone who would be able to guide me around this new world, and since Diana seemed to be the nicest among the three, I agreed. This therefore began my training as her protégé, and therefore her ward.