Percy Jackson/Heroes of Olympus headcanons

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- Although I definitely think that Nico talks to both Percy and Annabeth about Tartarus, I think he just feels more comfortable talking to Annabeth. Partially because half of him is bitter because part of the reason he went to Tartarus the first place was for Percy, so that kind of taints their conversations. (I also have a whole spiel about how Percy and Nico are friends but Nico is still kind of bitter but that's not for right now lmao). But also because she just kind of gets him more. I mean, no one really understands, but at least she knows what it's like to feel out of place and unwanted (more than Percy) and how Tartarus amplifies that

- They're both smart and can cause so much chaos!! Nico will just say outright false things about "Back in the day..." and Annabeth just nods along and says "Yeah, that's true" and nobody questions because like... it's Annabeth, y'know? Anywho, they spread the idea that forks somehow didn't exist before the 1950's

- Knives!! They spar together all the time because Nico wants to get better with a dagger and Annabeth wants to get better with a sword. At some point, they're both constantly armed with 2 or more knives at all times and sometimes they trade (for funsies)

- This is pretty overdone but... Annabeth helps him redesign the Hades cabin (and I think a lot of people forget that Nico designed it in the first place but she understands his willful ignorance so she goes along with it, to the point where she will basically gaslight anyone who's like "Nico... didn't you design it in the first place?")

- They bond over having smart and talented boyfriends who are also absolute fools

- Capture the Flag!! Hades is ALWAYS with Athena and they dominate! It gets to the point where Chiron has to force them to split up sometimes. Nico and Annabeth both want to have a game where it's Hades and Athena vs everyone else because they're both certain they'll still win (and they would)

- In other camp activities though, they rarely pair up because they always win immediately and it's not as fun

- Annabeth and Nico trade books! They do the thing there they read and annotate a book and then swap. They tried to start a Camp book club one time but it was just them dominating the conversation and ranting

- They do a lot of movie/book/tv show references together but always completely deadpan so you can't really tell they're mimicking anything unless you know what they're referencing (For example: they do the "don't say that, please don't say that" from Black Widow a lot)

- There comes a point where Nico (and also Piper) refer to Annabeth as "my wife" which everyone thinks is fucking hilarious for a multitude of reasons. It also confuses new campers because they'll see Nico kiss Will and ask "But what about Annabeth?" with great concern. Nico always just goes "Uh huh, Annabeth is my wife but Will is my boyfriend." "But... what?" "I don't like women, I exclusively date men. But Annabeth is my wife." (Piper will see Nico and Annabeth talking and walk up and playfully shove Nico and just go "Hey, stay away from my wife" and Nico always says "Your  wife? She's my wife! Just ask my boyfriend, he'll tell you!")