"We need music," Nico said. "How's your singing?" "Um, no. Can't you just, like, tell it to open? You're the son of Hades and all." "It's not so easy. We need music." I was pretty sure if I tried to sing, all I would cause was an avalanche."

Nico has black hair that always looks like he just got out of bed (messy and shaggy) and olive skin. By The Battle of the Labyrinth, his skin has paled to white, and he takes to wearing black clothing with skeletal designs, a Stygian Iron sword and a silver skull ring (by the end of the book). By the time he meets Hazel Levesque, she describes his fingers as ghostly white, like their father's.

It is mentioned when talking to Travis and Connor in The Last Olympian that he doesn't approve of stealing. He instructed the children of Hermes to leave whatever they could as payment. Will is the first counselor of Apollo's cabin not to die in battle and to appear in a book other than that of his introduction. Oddly, Leo refers to Will as "the archer dude" in The Lost Hero, despite the fact that it has been mentioned multiple times that Will is a healer, not an archer. This is probably because Will was carrying a bow when they first met.

So yeah - Will and Nico made a good team.

nico is probably a great dad and always tries to be there for his kid. He spoils them a lot and never let’s them feel like they’re not appreciated. He looks like a really strict dad but in reality he loves his kids a lot and is rarely ever strict with them will is the strict one and is always fussing over his kids and buying them new clothes. He’s always wanted kids, so he naturally loves them a lot no matter how much they annoy him. He’s very patient with them and sometimes helps Nico out with showing care towards them since he’s not the best at it. The kids have to get will’s permission to do anything tho if they go to Nico for it he just sends them to will at which point the kids groan