Julia

“Nico drew his sword. His smile was even more unsettling than his scowl.

"Underground," he said. "My favorite place."

Underground was not Jason's favorite place.”
― Rick Riordan, The House of Hades

“He understood how dangerous oaths could be. But Leo didn't care.
"I'm coming back for you, Calypso," he said to the night wind. "I swear it on the River Styx.”
― Rick Riordan, The House of Hades

“You mix Greek and Roman, you know what you get? You get BAM!”
― Rick Riordan, The House of Hades

“About five meters ahead, Nico was swinging his black sword with one hand, holding the scepter of Diocletian aloft with the other. He kept shouting orders at the legionnaires, but they paid him no attention.

Of course not, Frank thought. He's Greek.

[...]

Jason's face was already beaded with sweat. He kept shouting in Latin: "Form ranks!" But the dead legionnaires wouldn't listen to him, either.

[...]

"Make way!" Frank shouted. To his surprise, the dead legionnaires parted for him. The closest ones turned and stared at him with blank eyes, as if waiting for further orders.

"Oh, great..." Frank mumbled.”
― Rick Riordan, The House of Hades