Suspected Hazel’s past

Percy remembered how confident she’d acted when they first met — taking control of the situation with the gorgons and ushering him to safety. She’d comforted him at the shrine of Neptune and made him feel welcome at camp.
Now he wanted to return the favor, but he wasn’t sure how. She looked lost, bedraggled, and thoroughly depressed.
Percy wasn’t surprised that she had come back from the Underworld. He’d suspected that for a while — the way she avoided talking about her past, the way Nico di Angelo had been so secretive and cautious.
But that didn’t change how Percy saw her. She seemed... well, alive, like a regular kid with a good heart, who deserved to grow up and have a future. She wasn’t a ghoul like Phineas.
“We’ll get him,” Percy promised. “He’s nothing like you, Hazel. I don’t care what he says.”
She shook her head. “You don’t know the whole story. I should have been sent to Punishment. I — I’m just as bad — ”
“No, you’re not!” Frank balled his fists. He looked around like he was searching for anybody who might disagree with him — enemies he could hit for Hazel’s sake. “She’s a good person!” he yelled across the street. A few harpies squawked in the trees, but no one else paid them any attention.