Azir and Sivir, whats the relationship?

Apart from distant relatives, what is the NEW relationship between these two? Would love to hear from Riot.

For starters, Azir is Sivir's only real remaining family, they are both of the same blood. Also, Azir did save her ass, so she owes him BIG TIME. Which leads me to asking this; since sivir is this money hungry gold obsessed mercinary with no alligence to nothing, will Azir be her first?

I mean, he glorious, they are related, the dude lifted a hand and raised a city, and of course, HE SAVED HER ASS. Or is she trying to swindle cheat him (i dont know how honorfull/honorless sivir is, im going to guess she has no honor).

Also, what does Azir expect from her? Want from her? need from her? How does Azir plan on spreading Shurima, he raised a city, but its technically empty, he cant raise the dead, only images.

Or can he actually raise them back from the dead with blood magic the same way he was revived? Could he gather the remaining True Shurimans and with a bit of their blood bring back some of his people? Cuz right now hes standing on an empty city.

Rito please spill da beans.