“He had electric blue hair that had stuck around his head like tendrils of a startled octopus.”

“Magnus had a list of favored traits in a partner-black hair, blue eyes, honest…”

“He found himself wanting to write poetry about how her blue eyes were like starlight and her hair like night, because "night" and "starlight" rhymed, but he had a feeling the poem wouldn't turn out that well…”

“Oofy, thinking of the tenner he had given Freddie, writhed like an electric fan.”

“With his sunglasses gone and his scarf hanging down, there was no denying that he had no flesh, he had no skin, he had no eyes and he had no face.
All he had was a skull for a head.”

“Dakota's head was stuck in his toga. He staggered around olike a Kool-Aid-stained ghost.
"Um," Percy said, "should I wear my bed sheets?”

“Oh, if that blue bastard, is just stickin' around -" [find a candle stand, which startles him] *gasp* "…That's new!”

“He had long nostril hairs, powerfully intimidating, like an unscheduled nightmare.”

“Hades took off his helm. His complexion was even paler than usual. He had a bad case of helmet hair. He was sweating and nervous and blinking like he had something in his eyes. "I am Hades," he said in a squeaky voice. "I love you.”

“The night crackled… Everything had turned to static electricity in the heat. I combed my hair to watch the sparks fly from the ends.”