ranking the olympians (+hades) based on how likely they are to turn against zeus/olympus when the (second) demigod rebellion happens:
1. apollo. duh. his whole arc in toa is learning how corrupt olympus is and how much the demigods are currently suffering. also he calls zeus an abuser multiple times throughout the series and literally the whole main conflict of toa is standing up to and overthrowing an abusive father figure like. obviously apollo overthrowing zeus is the next step.
2. hera. at the end of ton she’s distraught about jason and (rightly) blames zeus, speaks against him and chews him out IN FRONT OF the whole olympian council. she could be motivated by jason’s death to turn against her husband, especially with urging from apollo. also, she’s gone behind zeus’ back before in hoo with the whole camp swap thing, so she already has a precedent of breaking zeus’ rules in order to (in her eyes) help the demigods. the only thing that might make this difficult for her is that, presumably, percy and annabeth would be leading the rebellion, and hera and annabeth’s relationship is uhhhhh. but i think for jason’s sake they could both bite their tongues and reluctantly work together.
3. dionysus. despite him being kind of an asshole in the earlier books, he’s now one of the most sympathetic gods. he has the most contact with demigods, and thus is exposed most to their suffering. he clearly has strong relationships with some demigods at camp, like pollux and nico, and he wouldn’t want to see them destroyed. also, he’s the only one who wasn’t born a god, which would both make him more sympathetic to the plight of the demigods (he used to be one) but also makes him kind of an outcast on olympus already. AND he was sentenced to an unfair punishment from zeus, which, although not as harsh as apollo’s, surely must make him a bit bitter against his father, and thus an easier target to convince to turn against him. he doesn’t personally like percy much, but by the end of pjo its clear that he has a grudging respect for him, so i don’t think his personal irritation with percy would be enough to deter him from joining the rebellion.
4. artemis. like apollo and dionysus, she has more contact with demigods than the other olympians through her hunt. however, while she definitely recognizes that the way zeus is running things is unfair (she expresses multiple times during toa that she thinks zeus’ punishment of apollo is too much and even defies his direct orders not to help apollo multiple times), i don’t think she would be very enthusiastic about straight up betraying him. she seems to prefer to keep to herself and keep out of olympian fights, even if she privately has an opinion on them. however, she clearly cares about apollo, and i think she would join the pro-rebellion to protect him, since defecting from olympus would definitely make him a target.
5. hermes. okay he was DEFINITELY more sympathetic to luke’s side during the titan war than he let on around the other olympians, right? like that whole part in tlo where he refers to luke as “my son, my greatest pride…” ;_; shut up i WILL cry. i feel like he would definitely be sympathetic to the rebellion’s cause, but i’m not sure if he would be brash enough to full-out join them. sort of like artemis, i feel like he prefers to lie low during these olympian fights, even if he does personally have a favorite side. i think that for luke he would be pro-rebellion, but also after seeing what happened to luke he might be hesitant to join them because he doesn’t want to see the same thing repeat itself. he would definitely be neutral at the start, but he could probably be convinced to join the rebellion once it looked like they were going to win.
6. hades. he hates zeus, but he also hates percy. what to do? i feel like he would join the pro-rebellion if nico and/or hazel yelled at him to, but he’s mostly just doing it for them, he doesn’t have a super big stake in this. so basically the same as how he acted in the titan war lmao.
7. hephaestus. similar to hades, i feel like he wouldn’t really care very much about this. maybe he would lean a bit more pro-rebellion because he’s been an outcast on olympus and would want that to change? but also if hera is allying with the rebellion that would probably drive him away from it because they clearly. don’t get along. i’m not sure! i feel like he’s mostly neutral but is a tad bit sympathetic to the rebellion– maybe not enough to act on it, but privately.
8. poseidon. while he would definitely not be pro-zeus, i have a hard time seeing him as pro-rebellion either. the only reason he would be pro-rebellion is obviously because percy is leading it, but even then, i think he would be pretty neutral. he doesn’t seem to care much about demigods besides percy and honestly seems pretty content with the status quo. maybe he would be pro-rebellion because he thinks he could seize more power in the power vacuum that overthrowing zeus would leave? but if he would ally with the rebellion it wouldn’t be “so we can have a non-corrupt olympus” it would probably be more like “so we can have the exact same olympus but i’m in charge this time”. so maybe he’ll help them, but i’m not sure if he’ll really agree with them.
9. aphrodite. this was the last one i wrote and i kept moving her around the list because honestly??? i have no idea how she would side. i feel like she would lean a bit pro-zeus because it seems like she likes to mess with the demigods and finds the dangerous quests they go on romantic and exciting (i’m thinking about that scene in moa where she tells annabeth how exciting her love life has been recently and annabeth nearly strangles her). if someone told her “okay you’re not allowed to send demigods on quests or pluck them out of nowhere and toss them across the country just for laughs or. really do anything to them at all” i think she would maybe be upset that they’re trying to ruin her fun. but that seems like kind of a weak motivation for something this big?? so idk i think she would be mostly neutral just like poseidon and hephaestus but she would lean pro-zeus (or anti-anti-rebellion).
10. demeter. she doesn’t seem to care about or even really like demigods, and she seems like someone who would be invested in tradition and “if it ain’t broke, don’t fix it”. so i feel like she would be pro-zeus, just because this has been proven to work for the past two millennia, so why change it up now?
11. athena. she is pretty loyal to her father, and i think she would be very not confident in the ability of the demigods to govern themselves in the absence of olympus. she would assume that, with zeus/olympus gone, the demigods would just be snapped up by someone else looking for some malleable young minds to use as their pawns (like kronos), or just completely fall apart and have no cohesion. i feel like she would be pro-zeus just because she doesn’t buy what the rebellion is selling. like, WOULD it be better without zeus/olympus? what alternative are they proposing, exactly? what is their plan for what comes next? have they thought this through at all? also i think that the fact that percy is the one leading the rebellion would definitely undercut her confidence in it lmao, she’d be like “this dumbass really thinks he can come up with a better way of running things than the thing we’ve been doing for millennia? hm. no.” i would be inclined to say she would be more sympathetic to the rebellion because annabeth is co-leading it, but she disowned annabeth in hoo and they never really made up, so ¯\_(ツ)_/¯
12. ares. idk bro i just feel like he would see the demigods complaining about their mistreatment and be like “stop being a bunch of whiny babies you brats”. also if percy is leading/co-leading the rebellion? anger. hate. rage. kill. no WAY is ares EVER going to side with that little punk
13. zeus. duh. he’s the one they’re trying to overthrow
that’s it! feel free to let me know if you disagree / if i missed something <3