Mortal or demigod?

"Katie who's this?" A man walks up from a house he looks like he's riding a horse but He shimmers and he's uh.
"he's a Centaur" I whisper to katie who laughs
"Chiron This is Amber. She was trying to pet the dragon"
"Good thing you stopped her then" he says with a joking light in his eye
"So Amber What brings you to camp half blood?"
"Um a letter" I hand him the letter. and he suddenly looks confused.
"K-Katie go tell the cabin leaders meet in the big house. "
"Uh ok?"
she leads me towards a cabin giving out tour lectures occasionally stopping a person to tell them to meet at the big house.
"Stel can you take over with amber's tours? I've got to go to get annabeth." She asks a girl with red hair.
"Sure." the girl walks over to me
"Hi Im Stella But you can call me Stel, or ella. Lets finish your tour"
She walks along humming as we walk towards a Brown cabin with a swan on the front.
"This is Enyo's cabin." I jerk up as she says this "Enyo is-"
"The goddess of war. Her only child is Sam Hamper"
"How'd you know?" Ella stares at me.
"Um" Im reluctant to tell her "I saw her on a fan fiction?"
"Oh. that makes sense. Sam Is one of the few demigods who can actually touch electronics without getting killed.
"Mrs. O'leary! No! drop! thats Shadow's!" a Girl with a rough tone yells from behind the cabin.
"That would be Sam. She hangs out with the dog's here at her cabin."
"But I thought she didn't have a cabin?"
"We built one last year. Sam requested it actually. Not much of a surprise sense her boyfriend broke up with her"
"Max broke up with her?" Stella looks at me
"You read a lot of fan fiction don't you?" I blush and nod.
Suddenly a gray st. bernard jumps around the house holding a dog bed in its mouth like a frisbee It leaps on to me and shimmers and grew into a Huge gray dog I'd like to say I dealt with it. I mean I LOVE dogs but seriously one the size of a tank on top of me, I screamed
"Mrs O'Leary Come." Sam called
I stood up as the Huge dog crawled towards sam and dropped the bed.
I brushed myself off and stood up.
Stella was trying hard not to laugh.
"Not funny stella!"
"I know I know" she turns to sam "Chiron wants all cabin leaders to meet in the big house"
Sam gets up and whistles. A black border collie bounds around the cabin and they take off.

Notes

ok I need a daughter/son of hermes Just someone to be the mischievous person who welcomes amber into the hermes cabin.
Please comment! :)