Anyone want to talk Demacia?

Hey everyone. So my favorite sets of characters in all of League are the Demacians. I'd like to talk about some lore and speculations and I'd like to hear yours as well!

Okay, so what I've been thinking about lately is Garen and Lux. If you remember, in Lux's league judgement (sadly not canon any more...), she makes reference to the fact that she's never met Garen, despite being siblings. This leaves open two main possibilities.

1. The age difference is large enough that Garen was in the military before Lux was born. The art doesn't exactly reflect this though.

or my theory (I don't know if this has ever been talked about, I'm a little new to the boards)...

2. Garen's family sent him away at an early age to live at the castle to act as Jarvan IV's friend and guard.

It's a bit dark if you think about it- taking a kid away from his parents so a prince could have someone to pal around with, but I think on some level it makes sense. Their last name is Crownguard, which means they definitely have a history of defending the crown. Secondly, if you listen to Jarvan's dialogue as he wanders around the Rift, you can definitely hear that he is at least a little bit spoiled. ("Who dares defy my will?" ) So Demacia is definitely one of those countries where their royalty takes advantage of their position. (See Jarvan's judgement: Royalty Has Its Perks) So I wouldn't put it past Demacia to do something like that.

Garen's off at the castle, Lux is born, and then they never meet. Their parents are proud of Garen for being in such an important position and making a name for himself, so Lux gets to hear all about him.

I also like this theory because it opens up some other things such as:

1. Did Garen's "DEMACIAAAAAAA" personality come from growing up in the castle? Was it propaganda? Was he inspired by J4? Or would he have been like that any way?

2. What exactly is Jarvan's relationship with Garen? How much of it is servant/prince and how much of it is loyalty/friendship?

And unrelated to this theory entirely, I've always wondered how Xin Zhao fits in to this dynamic. Does he interact much with Jarvan IV and Garen? Or does he mostly just watch them from the king's side.

There's a lot of dynamics going on here- I wish that they would be revealed through something, but in a game with so many characters and stories, I understand that they'll pretty much always just be speculation.

EDIT: Okay so apparently the lore says that Lux hasn't seen him since he joined the league, not for forever. My bad guys... I still like my theory though.