Nico

“He scowled at Jason. "And please, I don't like being touched. Don't ever grab me again.”
― Rick Riordan, The House of Hades

“Jason's fingers itched to draw his sword. He'd met plenty of scary demigods, but he was starting to realize that Nico di Angelo--as pale and gaunt as he looked--might be more than he could handle.”
― Rick Riordan, The House of Hades

“Is this guy Love or Death?" Jason growled.

Ask your friends, Cupid said. Frank, Hazel, and Percy met my counterpart, Thanatos. We are not so different. Except Death is sometimes kinder.”
― Rick Riordan, The House of Hades

“Then she did something so unexpected Nico would later think he dreamed it. She walked up to Nico, who was standing to one side in the shadows, as usual. She grabbed his hand and pulled him gently into the firelight. ‘We had one home,’ she said. ‘Now we have two.’ She gave Nico a big hug and the crowd roared with approval. For once, Nico didn’t feel like pulling away. He buried his face in Reyna’s shoulder and blinked the tears out of his eyes.”
― Rick Riordan, The Blood of Olympus