I'm going to start off by saying that Solangelo is my OTP! (Duh.) I am going to talk about them and my other ships.

Solangelo: I ship them mainly because of BoO. In those few last Nico chapters you could clearly see that Nico has feelings for Will and Will returned them. Like they totally had a cliché moment. When Octavian was threatening Nico, Will pushed Nico behind him to protect him. Like the guy always does with the girl in the movies.
Also why would you hold someone's hand to prove that they were shaking? No, Will held Nico's hand to see if he's okay. He said actually, he was like, you are not okay. I felt it when I touched your hand. Or something like that.
Also Nico had butterflies in his stomach. Plus when Will gave him that tar dirt gum Nico leaned on him for longer than he should. Will took on six Roman warriors to get them away from Nico and Nico saved him. Lou Ellen said that she heard a lot about Nico and where do you think she heard about him? Will obviously.
Clearly they like each other and should be together. Nico who has lost everything and is on his own. Will who lost his brothers and has to take on the responsibility of being head councilor. Will knows what it like to lose someone who love.
Of course there is the cliché they are opposites, light and dark, sunshine and shadows, but it is more than that. Will tries to save lives, where Nico welcomes death (like when the son of Venus sacrificed himself to kill Octavian).
People who ship Cecil and Will or Will and Lou Ellen, really!?! There is no chemistry there between either of them! Like did you even read the book!?!

I am pretty sure that Nico is (100%) gay. Like what he had with Reyna was more like brother and sister and not romantic. 
In fanfics people say that Nico wears fingerless gloves, paints his nails black, and wears makeup. I could see that actually happening in the books.

Will, no one really knows much about him. Some people say that he is a cliché Apollo child stereotype and others say that he's punk. Personally I am okay with either one. Also about his mother, there's a lot about her. Also about Michael and Lee. Honestly I don't know what to think. I also believe that Will is gay too, because of his interest in Nico. I'm not saying that he is gay, but I think he is. 

PS. I know that Will is an important character and was not part of the books to be Nico's love interest. I'm just saying that Solangelo is my OTP and I really hope that they get together. And it would be my life's dream! ❤️❤️❤️ I am not saying that they will get together right away and start banging. No, their relationship will probably grow over time like Percabeth's.

Percabeth: Okay do I really need to explain why I ship them? If you want to know just read the books or if you have read them again. Like Percy is a speed boat, but Annabeth is the anchor that keeps him ashore.

Percy, honestly I believe that he is bisexual. I mean, the way he acts sometimes, like around Jason and stuff.

Annabeth however I believe that she is straight. (100%)

Caleo: I know that people say that the ship came out of nowhere and it kinda did. I still ship it. There is just something to it that makes all so... You know?

Leo come on people for real, he is like the straightest guy ever. He hits on literally every girl. What interest has he ever shone in a guy? Name one. I. Dare. You. Prove it if you believe otherwise.

Calypso, is straight. I never heard of any girls landing on her island, have you?

JasonxPiper: Jiper, Jasper, Jasiper, whatever you want to call them. I guess that they are okay together, but like Caleo there relationship came out of nowhere. Like Jason woke up without any memories and Piper has a lot of fake memories about him and them being together.

Piper well I'm going to say that she is straight, because I have not seen her show an interest in a girl. Her main focus is Jason.

Jason is like totally bisexual. The way he acts around Percy and describes other male characters.

Frazel: Seriously they are an adorable couple. They both had lost their moms and where they were friends before they were a couple. They actually got to know each other before they started dating.

Both of them are 100% straight. Like I said before, please prove me wrong if you disagree with me.

Okay so these are my main ships. If you disagree with me or have something you want to say, please say it. It has been a few months since I've read the books, so forgive me if I forget something. I would be pleased to hear your thoughts and feelings and opinions. :)