Sol and percy first meet I the lighting thief they were each others first friend
Percy was one of the only few campers that didn't assume sol was a crazy party maniac because they were a child of dionysus and sol never assumed percy was dangerous due to being a big 3 kid
Even after lightning thief they keep touch online and often send each other letters
sol would sneak in icee's ,gummysharks and other types of blue candys from percy
percy in turn would bake blue cookies from them (basically saying i love you atp)
In sea of monsters there's a bit of tension in their relationship like their still close but due to annabeth and being in clarisses team they drift slightly apart
they do help percy with tyson since percy doesn't know how to deal with siblings at first
the more they talked both irl and on camp the more they both realized they liked eachother but they both never said anything cause they were already great as friends
during ttc and botl sol was rocking a hardcore scene kid look and percy was down BBBBBBBAAAAAAAADDDD
pecry helped sol alot after castor died and helped them alot during the griving progress and encouraged to stop using their insanity powers because it was hurting them
this was also around the time percy started getting into punk subcultures annabeth was not a fan but sol was his BIGGEST supporter even making a couple of patches for him
percy also helped sol with their identity with being black and nonbinary and threatens to beat up anyone who messes with them
tlo is were shit really hit the fan with them
in the scene with dionysus he tells percy to take care of pollux he says 'and you better take care of good sol too...they like you yk so if you break their heart i'll turn you into a dolphin and sell you to sea world johnson don't try me'
this is were percy kinda realized he didn't love annabeth but felt like they had to be together but also when their crush on sol became more obvious
this is also where sol technically died protecting percy being impaled by luke (they didn't know percy had the achilles thingyy) and percy lost. his. shit. screaming, crying ,trying to kill luke, wishing it was him who died and thinking it was all his fault yk the usual (clarisse was also doing the same-)
but thanks to inheriting the rebirth aspect of dionysus they managed to come back by the end of the book and percy nearly kissed them and became so much closer than they already (they were basically like a couple) were much to annabeths dismay
during the lost heros and son of neptune sol was tearring their hair out looking for percy and percy in SON thought he was remembering annabeth but he was actually remembering sol when he saw them in MOA
during MOA annabeth was also being extremely at sol mostly due to stress and jealousy and percy was not having ANY OF IT which caused alot of fights
during HOH annabeth and percy both quickly realized they didn't actually love each other they just both felt pressured by the gods to be together and both realized they were gay-
as soon as percy got back from tartarus and got medical attention ,sleep and nutrition he confessed he loved sol and they finally kissed
during BOO and afterwards they became an actual couple and sol helped percy figure out his identity and percy got sol into punk
pecy also helps sol with their natural hair often helping style it and even braiding it
mr. d may not like percy but sally ADORESS sol
nico and hazel kinda became their pseudo kids
their very coraline and wybie ,punkflower and kat and raul coded