"Amphitrite? Triton?"

"Mother? Father?"

"Poseidon. Son."

The three members of Royal Undersea Family stare at each other in befuddlement. The demigods around them pay them no notice, as they cannot be seen or be touched. Apparition in a strange dream-vision.

Poseidon run through his wife and son's behavior and… ah. So that's how they know about Percy. Still… "How long?"

"Over a week ago. Only happen once." Answered Triton.

"Just about a week ago. Once, too."

Huh. "This is my third time." Poseidon admitted. The second one should happen close to Triton's. Wait. Didn't he scream a bloody murder when waking up?

"How strange." Triton thought it was Nereus' method of prank. But if his parents are having it as well… "Is this your doing, father?"

Poseidon shook his head. "I am just as lost as you are."

Amphitrite hummed, saying nothing.

The three then returned their attention to the surroundings. To Percy. Just in time to see representation of Ares and Athena Cabins running in, each side holding flag represent their godly parent.

Ah. Capture the Flag night.

Hermes Cabin make alliance with Athena and Apollo. Which mean the little (illegitimate) Sea Prince would be siding with Athena's brats. How lovely.

Triton's eye twitch seeing the way Percy awkwardly holding his sword and shield, while Poseidon tried to drown out Neptune's raging rant about poor choice of weapon displayed at the table. His Roman side is taking serious offense that none of these weapons suited the child of the sea and no one pointed it out. All of it would just serve Percy as poor warrior and severely hold back his potential. Nevermind making him prone to harming himself instead his opponent.

("Whoever the Graceus in charge of sword-fighting lesson, he or she should be demoted! This gross negligence is unacceptable!"

"Hush")

Oh. And apparently someone told Percy what his role is but does not elaborate what it entails. Prompting him to asking for one of Athena's brats, who rebuke him coldly and give him barest information of what he should do.

"This is insult." Triton stated. "Absolute insult. I have hope since it was Athena Cabin that came with plan, and my half-brother's status is still not revealed to public." He shook his head. "Clearly I was wrong to hope if this is the plan."

"Indeed?" Amphitrite nodded. "Even Ares can come up with better plan than this while half-crazed with bloodlust. Unless the plan is making him standing like a fool and most likely a bait. Now That is different kind of insult."

"…I still find it scary how Athena's brood can sacrifice their ally oh so easily without said ally's permission or notice."

Poseidon say nothing. Neptune, on other hand…

"This is the plan? This? Sending a barely trained rookie with piss poor weapon to defend a border all by himself? You want your guard be broken through or something? Kid can only take half a squadron, maximum, and that with water boosting his power! If he cannot access to it or if there are more enemies, he's done for! And what about Archers?! Your Apollo kids ain't hog all the Archer dammit!"

He is ranting like mad and giving Poseidon all the headaches.

It gone quiet when they felt something is wrong.

"Anyone smell Underworld?" Amphitrite ask cautiously.

Triton nodded stiffly. "I do and I don't like it. Or what it implies."

Neither does Poseidon.

Last time anything from Underworld came after Percy… it was bloodthirsty monster after his life. This time it won't be any—

"Cream the Punk!" a group of Ares' children show up and surrounds Percy. Apparently, something had happened and Percy gain hatred of whole Cabin, who ignore his honest advice about where the flag is (Poseidon sighed at the cowardice, but understands that Percy is scared, plus no one told him what to do except guard the creek) and opted to beat Percy up.

He winces in pain when Percy staggered after being cut by the spear.

Of course, someone got Electric Spear, just their luck.

The upside was Percy fell onto the creek. Energizing him enough to beat all of them. Much to his immortal relatives' approval.

"Now that is battle worth of Atlantis' royalty." Triton nodded. "Just need to get him the perfect sword and polish his skills, then he would made fearsome warrior."

"He has markings of a good swordsman." Hummed Amphitrite. "I wonder how he would fare with polearm… say, Trident?"

The three had to roll their eyes when it revealed to be ruse made by Athena's kid. And growls when said kid show up after the fight is end. Only watching by sideline as Percy getting hurt. None of them believe her claim to "about to steps in".

They have seen her weapon. A dagger. And she doesn't look like a good fighter. Not one that could take in all present Ares' children and won by herself. Doubt she would take the risk, too. Even with Cap of Invisibility (it made Poseidon snorts in her attempt to mimic Hades). Athena's brats never do risky stunt that would endanger them unless their mother order them so.

Still. Poseidon wonder where the "presence of Underworld" retreat to. It cannot be just a trick made by Ares' brood. For one, they lack the skill for it.

GROOOOOWL!

Ah… there is it…

A goddamn hellhound.

Why not?, Poseidon thought, hysterical, Hades already send his fury, why not hellhound as well? Why there is only one? Where is the rest?

He owed Chiron a big time for shooting the beast dead.

He just wishes Chiron was faster at it.

They're lucky Percy's Water manipulation include healing by water but…

"…I was hoping he doesn't have to deal with Big Three bullshit… especially at times like these." Whispered Amphitrite in despair seeing her stepson's only chance to become normal and blends in with other demigods just goes up in flames no thanks to Athena's brat's thoughtless plan.

There is a damn good reason why guard duty is not done solo no matter how powerful the guard is!

A flash of light glows above Percy's head. A green trident. Surrounding it was four circles, moving in clockwise, containing other symbols of what Poseidon rules of. A thunderstorm, a wave, a horse, and cracks on earth.

"It's determined." Announced Chiron as the campers kneeled. "Poseidon. Earthshaker, Stormbringer, Father of Horses. Hail, Perseus Jackson, Son of the Sea God."

.

"I don't know you are able to do that." Commented Amphitrite the next morning.

They did confirm the Hellhound Incident and Claiming happens last night. It was all too easy asking question from the Naiads at the Camp Half Bloods.

Poseidon shook his head. "I don't." He answered. "But…" He closes his eyes.

It was you, wasn't it?

He receive shrug from his Roman counterpart.

"You were still at it, and maintain the façade when it was all clear would just breed resentment in young Perseus. Might as well take over and do the claiming—not like Chiron can tell the difference if we take out location context. You're welcome. By the way."

Yes… thank you.

Indeed. If a demigod gets claimed in Camp Half-Blood, the immortal world suspects they are Greek, if it at Camp Jupiter (really, Zeus? Named it after yourself? How narcissist you can become?), then they would presumed to be Roman.

A loophole that was severely abuses during Civil War, to the point they forbade contact between Greek and Roman.

Still.

Must you be that flashy? I won't hear the end of it!

Neptune give him a look.

Our Perseus inherits bulk of our power. By that I mean the whole package. Yes. Storm-making includes.

That…

That can be a problem.

Very few children of Poseidon inherit that aspect, seeing Poseidon is more of earthbound (waterbound?) god and Zeus' animosity towards him is well known. The second rarest aspect inherited is Earthshaker. Most of his child inherit Water-based power. For Percy to get the whole bag…

It makes him proud and terrified in the same time.

Maybe he should go and find Kym? His daughter is better at this sphere of power than Poseidon ever been.