Dear god Epic is slowly pulling me back into Percy Jackson so it's time for a mini crossover idea. (If I get some details wrong please forgive me, it's been a hot minute and I've got the memory of a walnut). Okay, let's say they've gotta get Odysseus's Bow for whatever reason. As the group's contemplating how they're gonna find this thing the gods all just slowly turn to Poseidon.
Poseidon: ...
Athena: You gonna give them her address or should I?
Poseidon: *Groans as he pulls out a pen and post-it note* Okay boys, you're gonna go to this address in Ithaca, knock on the door, ask for [Insert Name Here]. If she's not there go to this address in New Jersey.
Tyson: Who is she?
Poseidon: Your older sister
Percy: We have a sister? Why didn't you ever tell us about her?
Poseidon: ...
Athena: 🤨
Poseidon: .....Go visit your sister
So they do their adventure, escape a couple rough situations, slay a couple monsters. They eventually get to the address, knock on the door, and a young(in terms of appearance) woman with the bluest eyes known to man opens it. She's all smiles, offers them some snacks while she gets the bow.
Nico: Okay, just wondering, why do you have this thing?
Sister: ???
Sister: It's my dad's...Why wouldn't I have it???
Tyson: Huh?
Sister: Odysseus is my other dad
Silence for about a good fifteen seconds before a sly smirk spreads across her face.
Sister: You want the tea?
Percy: Hell yeah!
She pulls out her phone, sends someone a text and not even five minutes later Athena is bursting through the door.
Annabeth: Mom?
Athena: Hi honey. *Points to [Insert Name Here]* You, put the kettle on. *Points to the group* The rest of you, sit down and listen up because I'm still pissed about this shit.
Over the course of the next hour and a half she tells them the juiciest tea they've ever heard. By the end of it they're not surprised that shit never got written down because why would Poseidon and Zeus ever allow future generations know they were fighting that hard—caused a whole second war—for a damn mortal.
Apollo and Hermes pop in for colorful commentary and Athena is less than amused.
Athena: What are you two even doing here!?
Apollo: Bored :P
Hermes: Poseidon asked me to send a message to the girl—
Sister: I have a name 😑
Hermes: —But it can wait! Now have you told them about how they both tried kissing up to the kids to soften Odysseus up?
Apollo: Oh yeah! I remember Poseidon bribed me into giving Telemachus a couple arrows—
Athena: I WAS GETTING TO THAT!