SHHH DON'T QUESTION LOGIC ITS FOR THE FANS
mah.... don't use logic for this manga. just accept it.... hahahaha... for other characters that not mention at the end, just make up its story using our ridiculous mind. hahaha...
IKR? I'm still wondering what does it mean when Ukitake's tomb was shown, like, dude, he's a soul?(same with Rukia's first captain or vice captain) Why is he more dead than death? Where do dead people go when they die? (⊙…⊙ ) I'm really confused xD
Ok. from the beginning they said that only those with high reitsu could have children. I think it is obvious that the ranking nobles have a valued lineage. Rukia's adoption being outside the norm.
As for what has when someone from soul society dies, they are born in the real world. When some one dies here they go to soul society and the wheel turns so to speak.
You would need the occasional birth in soul society to balance the lives that were ended by the Quincy, who instead of cleansing a soul of a hollow ended its exsistece. Which created an imbalance and started a war.
Thar makes so much sense ヾ(☆▽☆) now I can rest in piece （￣へ￣）I want to see human Ukitake...
the citizens are all souls and technically dead right? And now they can have kids?! create life?!?