"Sorry, I don't know your name," he says to the giant. "Are you here about the letters? I think Uncle Vernon would really like you to stop sending them."

"Aye, he would, wouldn't he?" the giant says, with a twinkle in his eye. "I'm Rubeus Hagrid, Keeper of Keys and Grounds at Hogwarts. Now let's head inside, shall we, I don' reckon stayin' outside's gonna be good for me health or yours, eh?"

"Victor Antares Evans what do you think you're doing?!" comes Uncle Vernon's shriek when he notices the boy standing in the doorway. "Get back inside right this instant!"

"Ah, shouldn't keep the old prune waitin', eh?"

"Yes, Uncle Vernon," he says, going inside immediately. "I thought if I asked politely maybe they'd stop."

Vernon's expression shifts from frothing rage to abject terror once he sees the giant of a man squeezing into the hut after his nephew. The rifle he's holding—so that's what was in that long, thin package he got earlier!—shakes in his grip, but he doesn't shoot.

"Couldn't make us a cup o' tea, could yeh? It's not been an easy journey..."

...Uncle Vernon is holding a deadly weapon. Uncle Vernon is holding a deadly weapon and he's terrified.

There is probably a productive response to this but Victor has no idea what it is and doesn't think he could make use of it even if he did, because he is frozen to the spot.

Hagrid seems unintimidated. "Budge up, yeh great lump," he tells Dudley as he walks over to the sofa.

Dudley squeaks and runs to hide behind his mother.

Who's looking at Hagrid with a strange mixture of fear and curiosity.

Victor is still kind of preoccupied with the part where Uncle Vernon has a rifle.

"I demand that you leave at once, sir!" Vernon squeaks. "You are breaking and entering!"

"Vernon—"

"Ah, shut up, Dursley," says the giant; he reaches over the back of the sofa, jerks the gun out of Uncle Vernon's hands, bends it into a knot as easily as if it's made of rubber, and throws it into a corner of the room. 

He makes a noise like a mouse that's been trodded on.

...well that's frightening in an entirely different way.

But at least the giant is not Uncle Vernon. Not being Uncle Vernon is an important quality to have.

What does he do, what does he say—

"I'm sorry, Mr. Hagrid, but we don't have any tea."

The man throws his head back and starts laughing, and it's the kind of warm, happy laughter that tends to make people laugh along, even when they're not sure what it's about.

...that's probably good?

The laughter eventually dies down, and he looks at Victor with a smile. "Anyway—Victor, a very happy birthday to yeh. Got summat fer yeh here—I mighta sat on it at some point, but it'll taste all right."

From an inside pocket of his black overcoat he pulls a slightly squashed box.

Victor blinks at the slightly squashed box.

"Go on, take it," he says, offering the box.

...okay.

He accepts the box and tentatively opens it.

It contains an enormous, sticky chocolate cake with Happy Birthday Victor written on it in green icing.

"Thank you very much, Mr. Hagrid, this is lovely," he says earnestly.