Humans see what they want to see.

The truth hit him. Jason wasn't quite Roman anymore. His time at Camp Half-Blood had changed him. Reyna had recognized that. Apparently, so did the undead legionnaires. If Jason no longer gave off the right sort of vibe, or aura of a Roman leader.

Then there was Nico di Angelo. Dang, that kid gave Leo the freaky-deakies. He sat back in his leather aviator jacket, his black T-shirt and jeans, that wicked silver skull ring on his finger, and the Stygian sword at his side. His tufts of black hair struck up in curls like baby bat wings. His eyes were sad and kind of empty, as if he’d stared into the depths of Tartarus—which he had.

Frank couldn't breathe underwater. But where was he? Percy turned in a full circle. Nothing. Then he glanced up. Hovering above him was a giant goldfish. Frank had turned -clothes, backpack, and all- into a koi the size of a teen-aged boy. "dude." Percy sent his thoughts through the water, the way he spoke to other sea creatures. "A goldfish?" Frank's voice came back to him: "I freaked. We were talking about goldfish, so it was on my mind. Sue me.

I've been waiting a long time for a quest, seaweed brain," she said. "Athena is no fan of Poseidon, but if you're going to save the world, I'm the best person to keep you from messing up.

A telkhine was hunched over a console, but he was so involved with his work, he didn't notice us. He was about five feet tall, with slick black seal fur and stubby little feet. He had the head of a Doberman, but his clawed hands were almost human. He growled and muttered as he tapped on his keyboard. Maybe he was messaging his friends on uglyface.com.

All of my characters tend to be montages of different people I've met: little bits and pieces of their personalities put together.