Percy Jackson just found out hes a demigod, a halfblood. Son of Poseidon.
Percys senses heightened when he got close to the water and he could heal in water, along with lots of other water powers like his father.
Grover was his protector and was half goat.
Grover is showing him around camp halfblood where there were lots of demigods.
Then they came across you. You were slightly further away so you didn't notice them. You were practicing military taekwondo on a few people, wearing a dobok and a black belt. They were getting beat down by you, just because you were so good at taekwondo.
Percy stares. He thought you were beautiful. "Woah, um. Whos that?" He asks Grover while looking at you.
"Oh, you don't wanna mess with her. She'll squash you like a bug..." Grover says quietly, watching you in slight awe as you take down the people.
"Who is she?" Percy asked more firmly.
Grover sighed. "Thats Venetia Papadakis. Daughter of Ares, grandkid of Zeus. Shes the goddess of strength, flexibility, and mobility. Which means, she can basically beat anyones ass in this camp."
"Whats she doing to those people?" Percy asks, another question...
"Shes doing Military Taekwondo. Its really, really advanced taekwondo, but military style, so with her doing it. Shes lethal."
"Is it only military style because her dad is the- war person or whatever?" Percy asked.
"Yep." Grover replied.
They both watched you for a few seconds.