The Patterns make sense.

OHMIGODS THE PATTERNS.

Okay, epic rant here. Well, 更多 of a physiologic rampage on I KNOW SCHIST.
-THE QUESTS-
Okay, let's start with PJO. Book 1: Percy, Grover, Annabeth. Boy, Boy, Girl.
Book 2: Percy, Tyson, Annabeth. Boy, Boy, Girl.
Book 3: BREAKS THE CYCLE. Percy, Grover, Thalia, Bianca, Zoe. B,B,G,G,G.
Book 4: Percy, Tyson, Grover, Annabeth. B,B,B,G.
Book 5: Breaks the cycle, which focuses ONLY ON THE PROPHECY, aka Percy.
Why am I rampaging on this? Well, here's why...
超能英雄 of Olympus.
Book 1: Jason, Leo, Piper. Boy, Boy, Girl.
Book 2: Percy, Frank, Hazel. Boy, Boy Girl.
Book 3: *CONFIRMED* Annabeth, (Percy?), (Jason?), _______.
HOLY CHEESE IT'S OBVIOUSLY A GIRL. So yes, I'm done know.
So seriously, I think I have ultimately proved the character either has to be the Hazel, Piper, 或者 the new character. Narrowing it down! Who do 你 think it is NOW, 给 this info?

Call my crazy, but I see patterns everywhere. EVERYTHING CONNECTS. I don't care how 随意 it is, everything has to be influenced 由 something else.