Here's a lovely ship to consider. Frank, Piper, Hazel, and Leo, we shall call it fripazeleo.
That's really cute !
I already see Frank and Leo trying to be the "male dominant" of the relationship, but quickly realizing that Piper is the dominant one (even Hazel is more a top than them).
Piper would be so overprotective with her lovely dorks, and so in love.
Hazel would surprisingly be very proud of this relationship.
Their favorite activity would be the movie nights : all cuddled under the same blanket with some cup of hot chocolate in the hands (but the choice of the movie would always take at least one hour : between Leo who want to see a comedy, Frank a love story, Piper a zombie movie and Hazel fantasy one)
And with Leo who always said that he was the seventh wheel on the Argo II, well here, with his three lovers they would literally be the four wheels, while Annabeth, Percy and Jason would be the supplements, which make him laugh really hard and make him happy at the same time.
Always there for each other, they would love each other deeply and I don't doubt this love would survive all the challenges.
