[BleachOD]

Originally Posted by Geta Boshi

ArroNiero

Spoiler for Manga:

Was a first generation espada according to Zomari . And when he died he was blaming Aizen , so it pretty obvious he was created by Aizen . So I can say all the ESPADA were created by Aizen from Nel to Noi .

And yes the timeline doesnt make sense

ArroNiero

Spoiler for Manga:

Only Metastacia was created Aizen he died and was consumed. The hollow that consumed him was a first generation. First generation by definition are created naturally. He can't be first and second generation. So I would say ALL ESPADA except ArroNiero were created by Aizen.