Nico is about four years younger than Percy, so he would be around 12.
Yes, Percy Jackson does die in The Last Olympian, and many of his friends and enemies do as well.
At the end of the Heroes of Olympus series, Nico di Angelo ends up in a romantic relationship with Will Solace. Their relationship develops throughout the series, highlighting themes of acceptance and healing. This connection is solidified in the epilogue of the series, where they are seen together, illustrating their bond as they support each other.
No he does not, sadly. Annabeth seemed to have a romantic interest in him throughout the book, and a vampire named Kelli seemed to be flirting with him, but I'm sorry, he does not ever get a girl.
No, but at the end he starts dating Annabeth. Hey, it was bound to happen sometime. . . That and Percy's 16 for most of the Last Olympian, he wouldn't get married.
Nico Di Angelo's middle name was never revealed throughout the Percy Jackson series.
No, Grover Underwood does not die in The Last Olympian. He joins the Council of Cloven Elders.
No, they only started to date in the end of the book.
Yes, Hades has a cabin at Camp Half-Blood. But it is only constructed in The Last Olympian, after Nico helps to defeat Kronos. Zeus rewards Hades by bringing him out of exile. Near the end of The Last Olympian, at Percy Jackson's request, Hades and minor gods are built cabins. Also, unclaimed campers, both children of major and minor gods, are brought to camp. No he does not because that is made up and i am one
No because Luke killed himself to stop Kronos.
Luke dies near the end of the last book, "The Last Olympian."
Nico is described to have shaggy and messy black hair, and olive colored skin, and wild brown eyes. He is described to be found wearing all black (black T-shirt and ripped black jeans). By the end of the Battle of the Labyrinth, he is found to be wearing a skull ring on his finger.
Grover marries Juniper, a wood nymph, and becomes the Lord of the Wild before the events of "The Last Olympian." In the story, he helps Percy and the other demigods fight against Kronos and his army in the Battle of Manhattan. Afterward, he continues to protect nature and the environment as a loyal friend and protector of Percy and Camp Half-Blood.