So in discussing possible CT challenges a royals VS peasants thought was thrown out there.
However I do not know exactly who is royal and who isn't so I was turning to you all for help.

I got this list from u/synestron I'll make you a quick list, I might miss one or two since I'm doing it by memory and some might be debatable:

1: Sarah (dunno anything about wol/meia/echo)
2: Hilda, Gordon, Scott, Emporer
4: Pecil, Rosa, Edward, Yang, Ursula, Edge, Golbez, Ceodore
5: Lenna, Faris, Galuf, Krile, Xezat, Kelger (maybe, not really), Exdeath (maybe)
6: Edgar, Sabin, Kefka
7: Rufus (owns the largest city in the world, dunno anything about Crisis Core, might be more)
8: Laguna (he's a president? I guess that counts?)
9: Garnet

I've never played 10, 11, 13, 14, 15, 0, Beyond/Dimensions/KH. I know Noctis is royalty lol.

12: Ashe, Larsa, Vayne
Tactics: Delita, Ovelia, Ramza (kind of? he's a bastard), Alma

My thoughts would be for I: that Garland being a knight might be royal blood, it was pretty common that your knights were from landholding families which often some level of nobility. Not sure if that holds for the FF I world. That and the whole being Chaos might be a king of evil thing dunno.

VII: Yuffie I think was referred to as a ninja princess, Wutai royalty there?
Sephiroth and Aerith might have some claim to royal title as the last of their kinds, maybe Nankai also? But that seems like a stretch.

X: Seymour might count as royalty, I don't know it that was ever clear. I don't know if Yuna was given a title or anything for getting rid of Sin in X2 as I haven't sat down to play that yet.

T: If we are counting Ramza as a royal then I would be fairly sure that TGCid would also be of royal blood as if I remember he was the head of a knight family also. I don't remember if Agrias was said to be of royal family blood either.

Chime in with all your thoughts so that we can separate the pure bloods from the milk sop rabble