I need you to spill every. single. solangelo headcannon you have. ty 🫶
Oh I had to think about this SO HARD. (Also I have not read TSATS yet but I WILL SOON so if this conflicts with anything cannon... no it doesn't.)
~ Starting off soft, Will absolutely learns how to play Mythomagic and plays with Nico. They're both canonically massive nerds, it is destiny.
~ While they spend most of their teenagehood focusing on healing Nico's past, as young adults things slow down enough that Will uncovers his own slough of trauma that comes with being a caretaker from 12 years old onward and watching so many of his siblings and friends die/not being able to save them.
~ Will goes to college in New Rome to study actual medicine, but returns to Camp Half-Blood as a permanent doctor (which goes with my headcannon that Camp Half-Blood builds its own smaller version of New Rome for all the adult demigods to live their lives and help out camp from).
~ While Will goes to medical school... Nico simply decides education isn't for him and spends most of his time helping his friends, playing video games, being his father's right-hand man, and OF COURSE doting on Will.
Now for some sillier ones...
~ Stay-at-home boyfriend Nico di Angelo cooks the best home-cooked dinners that rival Sally Jackson herself and the demigods they're friends with in New Rome start inviting themselves over to Will and Nico's house for dinner.
~ The Solangelo residence is absolutely filled to the brim with collectibles and legos and everything nerdy you could ever imagine. They go to Comiccon together in California once a year and Nico is VERY dedicated to his cosplays.
~ Nico's favorite way to hug is by tucking his arms into his chest and just letting Will absolutely engulf him. Will's favorite way to hug is with Nico's arms tight around him, hands spread out on his back, while Will's arms hang loose and low around his waist, and lets himself sink into Nico's presence.