Getting kicked out of 6 schools by age 12 because he refused to stop being a bully beater
Telling the gods to fix how they run their shit with his whole chest no hesitation as soon as he thought to and them listening due to a mix of fearing and respecting him
The leadup to it being his bully beating manifesting/escalating in him fighting against an entire pantheon as a system for four years straight and continuing to afterwards too
Gifting Nico a The Ramones shirt
Insulting his classmates in Som for being 'a bunch of rich white boys' and carrying on his anti-capitalist mentality from the start and the franchise as a whole,including refusing to ask Poseidon for or accept riches
Confirmed to be psychologically immune to selling out in one of the Tkc crossover short stories as a god tried to use their powers to brainwash him but they had so little in common with an emphasis on want for positions of authority/OP abilities Percy was able to defeat him
Participating in Rachel's charity events and protests during their time at Goode High
Instantly riding for Hazel harder than anyone and nurturing her as an older brother figure and pseudo-dad as he does Nico
Disliking Annabeth flirting with him as she uses white girl tactics so he found her attempts gross and completely flew over his head as he couldn't comprehend how all That could be expressing romantic attraction
'The sea does not like to be restrained'Translation:Percy is an anarchist
Going on a quest to prove himself as completely unlike cis men to an arcaic group of young abused by the patriarchy girls and succeeding because he IS completely unlike cis men(read:transfem gender fuckery)
Sympathizing with victims of the system fullforce and in general(instant forgiveness and understanding towards Silena for being groomed to the bad side/eagerly speeding to save Chris from the Labyrinth/gentle treatment towards Ethan even as they fought and worrying over him at time with Luke)
Unstoppable brutality when it comes to fighting
His sense of humor as a whole
His Rbf is implied to reflect his anti-societal mentality
Not caring about his image in favor of being his authentic self no matter what happens or how much he hates himself at the moment as he always does
Compared in a contrasting way to Luke,who's fash trash yet constantly talks down to by him for not being as radical as him despite Percy knowing a lot more about and doing a lot more to do what's good for the people than he does(which is to say:Nothing except self-justfied violence against them and lying about doing good things for them only to never followup on them,as irl white men in authority pretty much are always like)and for not having it as bad as him despite Luke growing up sheltered in a fantasy land where everybody worshipped him while Percy grew up hurt nonstop in the real world and also taking Percy's rightfully earned title of 'The Gods' Martyr' for himself even in death like the attention seeking manchild he was when the gods barely did anything to him compared to Percy and tons of other demigods
Instantly clocking the gods as bad in Tlt thanks to his own past experiences with authority figures