User blog:North star/Trinity of my curiosity

I named it Trinity of my Curiosity because the 3 questions are making me VERY curiose these questions are:

1st:Which are the gods whose childrens are the 7???(I know they are given camphalfblood.com but somewhere i think they can't be,this is related to the 2nd question)

2nd:How could children of Ares/Mars and Hades/Pluto could there in the 2nd Olympian v/s giant war when there parents never participated in the 1st one???

3rd:ok now this question will literally kill me.....who is the 7th one Annabeth or Reyna???

Either god(or maybe gods)help me or someone else....................