Nico admits his feelings for Percy when he is confronted by Cupid. This makes Nico the first demigod acknowledged as homosexual in the series. He indirectly shares this secret with Jason, who is with him at the time, and then is obliged to explain. Nico appears to trust Jason in this scene, even if only grudgingly. Afterwards, Nico offers to shadow travel the Athena Parthenos in an attempt to bring the Roman and Greek camps together. He is accompanied by Praetor Reyna and the satyr Coach Hedge.
Nico helps transport the Athena Parthenos to Camp Half-blood to halt the attack from the Camp Jupiter. He is joined by Reyna and Coach Hedge. The trio shadow travel halfway around the world, causing Nico to lose a lot of his strength and start to "fade". When facing Bryce Lawrence, it was demonstrated that Nico could turn people into ghostly specters with enough effort.
Hades was also alluded to have been aware about Nico's romantic feelings for Percy during one of his conversations with his son. Hades gives Nico his blessing and tells him he'll prepare a room for Nico in the Underworld for if his mission should fail. He also informs Nico that he wants him to be happy, and that he is proud of his son.
Upon landing at Camp Half-Blood with Reyna and Coach Hedge he leaves them to destroy the onagers, where he finds Will Solace, Lou Ellen and Cecil. Will Solace and Nico start bickering, which amuses Lou Ellen and Cecil.
Later on, it is shown that Nico has not visited the infirmary or spoken to Will since the battle, and Will expresses his dismay at this, saying that Nico could at least have dropped by and Will would have been glad to see a friendly face. This surprises Nico, who hadn't realized Will might want to see him, and says that his face is usually not welcome, especially around the wounded/sick. Will is upset by this and protests, stating that people were always trying to befriend Nico, it was simply that Nico would not allow them to.
Some time later, when Nico answers the door to his cabin and sees Jason Grace, he momentarily mistakes him for Will, feeling disappointed when he realizes his mistake. He then feels annoyed with himself at being disappointed, and it is implied that he is interested in Will Solace.
After a conversation later on in which Will orders Nico to stay at the infirmary for three days of rest, Nico sees Percy and Annabeth and decides to clear the air between them, since they will be seeing a lot of each other in the next few years. He confesses his old feelings for Percy, while Annabeth looks on, smiling reassuringly and even offering him a high-five for managing both to say the words and to utterly astound Percy, who was oblivious of his feelings (at the time they existed). He says that Percy is not his type, and he was simply young, confused, lonely and scared with no one else to turn to or trust at the time. (Percy is confused, even dissapointed saying "What do you mean i'm not your type?". After he walks towards a waving Will Solace, the boy he chooses. In Trials of Apollo we get a glimpse of their relationship. It is the first Homosexual couple in Rick's books with the ship name ‘Solangelo’.
Nico's sword is made of Stygian Iron, which will kill monsters, and, unlike the other metals of Celestial Bronze and Imperial Gold, is capable of harming mortals. The metal, when being forged, is cooled in the River Styx, making it indestructible. It is implied that only beings of the Underworld, such as Hades and his children, are able to use a Stygian iron weapon. The sword helps him channel his power to control and summon the dead, along with draining an enemy's soul to reinforce his sword's power. He can also use it to create fissures in the ground, trapping anyone unlucky in the underworld. This is like what he did to king Minos. Nico being an incredibly powerful demigod; he has many powers and is aware that “With great power... comes a great need to take a nap," as he says after putting to sleep all of the skeleton guards in the Palace of Hades during his and Percy's escape from imprisonment during the Last Olympian.
Thalia Grace
Thalia Grace is a fictional supporting character in Rick Riordan's "Percy Jackson and the Olympians" series, as well as a minor character in the Heroes of Olympus, as Jason's sister. She is the demigod daughter of Zeus and Beryl Grace, a famous mortal actress. Thalia has angel-blue eyes ( thought done say she has stormy green), black long hair, and a spray of freckles and a brilliant singing voice.
Thalia Grace is the daughter of Zeus, one of the "Big Three" Greek Gods, the other two being Poseidon and Hades. Grover Underwood was meant to watch over her when she ran away from home at ten years old, reaching Camp Half-Blood two years later. On her journey, she met Annabeth Chase and Luke Castellan. They had brief encounters with the Hunters of Artemis, and were almost convinced to join, but got angry with Zoe Nightshade and did not join. When she was twelve, they were all attacked by a herd of monsters and caught by a Cyclops in New York. She was captured, but thanks to Annabeth, freed. They ran, but the monsters they had briefly escaped from caught up to them. As they reached Half-Blood Hill, Thalia sent Luke, Grover, and Annabeth over the boundary line while she faced the monsters. She sacrificed her life for her friends, but her father Zeus took pity on her and turned her into a pine tree to preserve her, keeping the rest of the camp safe.
Thalia is a very skilled fighter and as she stated in "The Titan's Curse"; she can always beat Luke in a battle (which Percy has only done once). It is also mentioned throughout the series that she has a punk sort of style, hates Barbie dolls, and likes Green Day. She is always listening to rock bands and is into the punk subculture. Annabeth compares her to Percy, telling him, "You guys are so alike it's scary. Either you would have been best friends, or you would have strangled each other."
Thalia wants to be strong as many people believe, but sometimes is very sensitive. She loves Chiron as a father and believes that her father does not care about her. She deeply respects Poseidon but does not know why. Her favorite god is Pan. She is also known to like cheeseburgers, mentioned twice in the series. She also appears reluctant to use her mother's surname.
It is mentioned that Thalia was turned into a pine tree when she risked her life saving her friends atop of Half-Blood Hill, which guarded the boundary line for Camp Half-Blood. She also appeared in Percy's dream. this is one of the first movies that came from the series in fact it is the first movies however she was mentioned a few times no on ein t he beginning really knew why
Thalia appears in Percy's dreams throughout the book. At the end of "The Sea of Monsters", she is brought back to life by the Golden Fleece which Clarisse places on her pine tree. Zeus gives her a spear which shoots electricity and turns into a small mace canister that fits in her pocket, and Athena gives her a bracelet that turns into Aegis, a shield with the Medusa's head carved into it. It is a replica of her father’s. Thalia is now potentially the child of the prophecy, and Kronos soon takes advantage of the fact. in the sea of monsters Percy uses the sea as a compass to naviagate to find the golden sheet which will bring back Thalia as her tree was dying in front of the camp