Vanguard
The bullets came at him at impossible speed, shot by what could only be described as a true master among master marksmen. Surely a single of these bullets could spell a man's doom, and he was facing a rain of these devastating projectiles. But against the impending avalanche of gunfire, he dashed to the side. As more came, he swung his weapon and blocked it. One bullet, then the second, then the third, and in but a second he had blocked more than a dozen.
His much slower movements defied both common sense and reason, the mere sight of his weapon's movements was something that dwarfed logic. But the fact he would use such a weapon and demonstrate his skill was a testament that he considered her something that could hinder him.
All it took were the slightest movements of his wrist to deal swing upon swing in the dozens, as if his weapon had come alive. He zigzagged to avoid the few stray shots, but even that proved to be less of an advantage than one would think. Before projectiles, no, before anything, the only way to attribute his tremendous movements would be to compare him to an unstoppable wall advancing upon his position, deflecting bullet after bullet despite the absurd difference in speed and numbers.
How many battlefields would one have to brave in order to meet such a storm head on? The thought was horrifying in itself, you wouldn't be able to call anyone so devoted to battle a human. Some legends are best sealed in fiction, never to be awakened, and he was one of them.
But less human than him was the beast that charged so fervently at him, it took a special sort of devotion to charge a storm without hesitation. Seeing him, Vanguard couldn't help but smile in admiration. How admirable, how deplorable! To think a hound so noble would fight so bravely for the sake of a comrade, it was enough to warm one's heart. Enough for him not to strike him down as he stood.
It was incredible. No creature, nay, not even the mightiest of titans would show hesitation. But more incredible than his suicidal heart was the audacity and foolishness that would make a beast believe something like this sufficient. Oh, but William did call him a shepherd. But wouldn't it be remiss for him not to guide such a lost lamb back towards the righteous path?
Thus, Vanguard spun in the blink of an eye to avoid the great beast faster than it could even react and grabbed it by the throat with crushing force. His speed, skill and strength were nothing short but inhuman, thus it was only fitting he'd use an inhuman weapon.
"Shall we dance?" He spoke softly with the gentlest of smiles.
And in that moment he used their combined momentum to twist his body with unmatched speed and slammed the creature onto Annabeth like a bat, delivering a blow with enough strength to shatter the ground where all three stood before twisting the beast over his body and delivering a monstrous pile driver over both of them.