Nico Cares for his Sister

Since Hunters were staying at half-blood hill, a "Capture the Flag" game was prepared and the Hunters won it. Half-bloods and Hunters discovered that Artemis was kidnapped by Luke and a misterious guy. A quest should take place and Grover, Thalia, Zoe, Phoebe, and Bianca will have to complete it. Percy will go with them in search of Annabeth and Artemis, but nobody knows that. Before going, the hippocampi asked for help because a creature had fallen in a trap, but finally, Percy saved that creature.

"Keep an eye on my sister!" Nico said this because he wanted Percy to take care of his sister since a lot of dangers were going to be present.
""Promise," he insisted." Nico wants to make sure that Bianca is going to be okay, so he made Percy promise that he is no going to let anything happen to Percy.

Bianca is going in her first quest and she is probably feeling the same way that Percy did in his first one. Nico is worried because a prophecy says that one of the people that is in the bquest will die. Nico´s worst fear is that her sister dies. He is a good brother because he wants to make sure that his sister is okay.