Villy Sari

“Nico drank from the chalice, then offered it to Jason. "You asked me about trust, and taking a risk? Well, here you go, son of Jupiter. How much do you trust me?"

Frank wasn't sure what Nico was talking about, but Jason didn't hesitate. He took the cup and drank.”
― Rick Riordan, The House of Hades

“Images flashed through his mind. He saw Nico and his sister on a snowy cliff in Maine, Percy Jackson protecting them from a manticore. Percy's sword gleamed in the dark. He'd been the first demigod Nico had ever seen in action.

Later, at Camp Half-Blood, Percy took Nico by the arm, promising to keep his sister Bianca safe. Nico believed him. Nico looked into his sea-green eyes and thought, How can he possibly fail? This is a real hero. He was Nico's favorite game, Mythomagic, brought to life.

Jason saw the moment when Percy returned and told Nico that Bianca was dead. Nico had screamed and called him a liar. He'd felt betrayed, but still... when the skeleton warriors attacked, he couldn't let them harm Percy. Nico had called on the earth to swallow them up, and then he'd run away- terrified of his own powers, and his own emotions.”
― Rick Riordan, The House of Hades

“Hazel frowned. "Why that one?"

"You don't see the ghost?" Frank asked.

"Ghost?" Nico asked.

Okay... if Frank was seeing a ghost that the Underworld kids couldn't see, something was definitely wrong.”
― Rick Riordan, The House of Hades

“No," Frank said. "I'm only a centurion."

Jason cursed in Latin. "He means he can't control a whole legion. He's not of high enough rank."

Nico swung back his black sword at another gryphon. "Well, then, promote him!”
― Rick Riordan, The House of Hades