We all know about the shabiki art giving us the little bits of information we need to survive, and I'm going to guess which ones are which and theories about them.

Frank: He's the first one released, and most likely the child of Mars, Roman god of war and the harvest. Pretty much we all know his last name means Master of Bows, which ind of shot down the child of Pluto idea.

Reyna: We've had lot of guesses on her parent, but I think it's most likely Trivia. Rick Riordan alisema it was a god/goddess that we haven't met yet. Despite the hundreds of minor gods, there are a few that are this powerful to make Reyna a key factor in the inayofuata Giant War.

Trivia: Most likely option in my opinion, easiest way to give Reyna powers is to be the child of the magic goddess. And it would explain her guard mbwa seeing as Trivia's animal is the dog.

Chaos: Highly unlikely. Mainly because Chaos is the most powerful god there is. He created the universe and he's the god of chaos, wewe finish the puzzle. It would give Reyna some serious power, and it would make Percy not want to be her enemy. Let's just hope Jason can come through for us with Reyna.

Nox: Goddess of night, it seems likely to me because Nox was an old goddess, older than the Titans. Not to mention it looks kind of like Reyna has the features. Dark hair and dark eyes add up to Underworld deities. But looks aren't everything. Look at Nico's picture, in the book he has shaggy black hair and dark eyes but in his picture, he has messy brown hair and hazel eyes (please see bottom picture).

Those are all I have for Reyna right now but what about the inayofuata character? I think it's Percy. I don't have a lot of theories concerning him, but it looks like him.
Our inayofuata character, hmm...what character have we met with wings? Our inayopendelewa groovy upendo god and god of hockey injuries. I think that the first one is Zethes, just a guess, but Cal just seems to fit with the sekunde one. "Pizza! Hockey! Destroy!" I'll never get tired of that.
Last but not least (or else wewe might just get stabbed if wewe alisema so) Hazel. It's pretty much assumed that her dad is Pluto. She fits the description zaidi than the Nico pic does anyway. Let's hope she's not as sarcastic and sardonic as her half brother. We need zaidi optimism on this quest, and let's face it, a children of Mars aren't great at delivering that, and Percy has too many doubts in his memory to try to be sure of anything.