I saw a post called fixing Paul Blofis by @Amela13 and this got me thinking. I believe and I always have that Paul Blofis is, in fact, Poseidon. This was my reply to her post and I was asked to elaborate so here we are.
(When Percy agreed so easily to Paul marrying Sally) I think Rick was leaving his options open. It does happen, sometimes, that an author has an idea and they are toying with it and this was meant to be a hint but since the story line did not come back around in future novels, the idea is dropped and it seems out of character. Here is what can easily explain this moment.
Percy may have realised that Paul Blofis is Poseidon, which would explain why he was so quick to agree. He knew he and his mom and sister would be treated fairly well. There are many clues that point to it.
Here come the clues:
First, Percy walks in and sees Paul wearing Neptune's lucky fishing hat. Isn't that an odd thing for a guy to do? Wear another man's hat, your girlfriend ex's hat? A god no less. Some might argue that it is Neptune's not Poseidon's but Poseidon and Neptune are the same god just different aspects.Does this prove anything? No but it does set off an alarm.
Next, Paul accepts very easily the existance of greek gods and Monsters and the fact that Percy is a demigod and he covers for him at school. This brings about another issue. Paul cannot be Poseidon because he is a teacher and Poseidon has better things to do. Well, perhaps it is a sacrifice he is willing to make for love. It has been proven that the gods can be in many places at one time so why not?
Next, Percy agrees quickly to the future nuptuals. Considering the prior relationship Sally had been through, Percy should be asking a million questions, warning and threatning Paul with all he his, when the question arises but he is like "Sure! Great".
I believe he doesn't need to do this because he knows that Poseidon and Sally have loved each other for always and that he would treat her "as the Queen she is." Poseidon's words there. So that was a no brainer for Percy. Is this proof again? No but dind ding ding...
This one is where I first realised Paul and Poseidon may very well be the same person. During the Battle of Manhattan, Paul joins the fight. He is not put asleep nor is Sally. Only a god could protect them from falling asleep like the rest of Manhattan. Why would Paul and Sally be saved from this fate? Because Paul is Poseidon and he protected Sally and this also explains the clear sight. Paul wanted to help Percy but since he was so busy at his Palace in the sea, he chose to protect the Jackson family and help them survive and possibly win the Battle of Manhattan.
Poseidon was there all along but in a weaker form which was Paul. Does this prove Poseidon is Paul? The alarm should be ringing very, very loudly now.
On their own, these items just point to the possibility that Paul is indeed Poseidon but with all these things put together, doesn't this make a good case that Poseidon is Paul Blofis?
Let me know what you think and if there is more evidence, feel free to share.
Here is the inspiring post by Amela13, if you want to check it out
https://riordan.fandom.com/f/p/3343172654596435118