Disclaimer: I do NOT own Percy Jackson characters. Rick Riordan does!

No POV

The three boys of the Big Three felt betrayed by the people they did so much for. They decided to leave a note just in case anybody decided to care, the note read.
Dear Campers,
We decided to leave, there is nothing left for us here so we're leaving and we're not coming back. You probably won't care but we figured we should at least tell you that we were leaving. After all we did for you this is how you repay us? By acting as if we don't exist. You left us for our egotistical brothers. Annabeth cheated on me with Chad, Jason felt as if no one cared for him because of Stephen, and same with Nico because of Trent. We hate you all except Thalia, Piper, Carrie, Katie, Connor and Travis, Clarisse, Hazel, Frank, Leo, Grover, and Chiron.
With no love at all (except for those mentioned),

Perseus Jackson, Jason Grace, and Nico di Angelo.
P.S. We hope you like our parting gifts. Minotaur Horn (Percy), Skull Ring (Nico), and Roman Praetor Toga (Jason)

And with that, they left. The three boys were on their own for about 2 months before Chaos found them. During these 2 months they fought off monsters, a lot of monsters, and they would bring kids to Camp Half-Blood when they found out they were demigods. They always had a hood on so that no one see their faces. They brought about 100 campers to camp and when the kids asked who they were they would just say 'We're your heroes' and leave before anyone could see them. One day they were walking and Chaos appeared.

~Flashback~
Percy, Jason, and Nico were just walking down an ally looking for somewhere to rest and then a vortex appeared and a man stepped out in an all-black suit, except his face was literally just the like galaxy, stars and all. They drew their weapons, and then the man spoke, "I am Chaos, Creator of the Universe. I do not come to harm you, I come to make you an offer. I have been watching you three the past 2 months, I see you have no one. Your fathers have shown you no love, your friends have betrayed you and left you alone. I can offer you to be the Commanders of my army, you will be the strongest beings in the universe and you will come to train with me and I will give you three the powers of Chaos and you will be stronger than the titans and the gods. You would have to change your names though so no one knows who you are, Perseus you will become Alpha, Jason you will be known as Stormstrike, and Nico you will now be known as Shadow. Do you accept?" The three boys were just standing there with their mouths wide open. Percy looked at Jason and Nico and they nodded, so he turned back to Chaos and said, "We accept, let's do it."
"Okay, well come step through the vortex with me, but first put these on pull the hoods up, the hoods are magical and no one would be able to see under unless you pull them off," Chaos said as he handed the boys cloaks. Once they put the all-black cloaks on they sort of changed, Percy's now had a sea-green trim around his, Jason's had a sky blue around his, and Nico now had a crimson red around his. They walked through the vortex into a huge room, Chaos must have been having a meeting because people were in the room. They were all around a huge table, and there was three empty chairs at the end of the table, one at the head opposite of Chaos and two right next to the chair on opposite sides. Chaos motioned the boys to the seats, Percy/Alpha sat at the head and Jason and Nico sat next to him. Nothing happened for a while then the chairs started to change, Percy's chair turned sea green and it looked like waves were on it, moving, it looked like the ocean. Jason's chair turned sky blue and then clouds appeared on the chair, and then Nico's chair turned a dark black and skulls appeared on the chair. They looked at each other and said in unison excitedly, "Sweet!" They didn't notice the army staring at them awestruck, Chaos spoke, "Generals and Lieutenants! Your new Commanders are here! Alpha, Stormstrike, and Shadow!"
~End Flashback~

That is how Alpha, Stormstrike, and Shadow were born.