Board Thread:Questions and Answers/@comment-30971377-20200511192632

"Though initially thought to solely possess the power to control the boundary of the two contravening existences, that of Shinigami and Hollows, this was proven incorrect."

Were was this proven? Aizen told Isshin, that the Hōgyoku manifests the desires of those around it. It was never proven though. All we got to see was the first case:

- Ichigo awakened his shinigami powers, which source is basically a hollow

- Chad awakened his fullbring, which is also hollow related (breaking boundary between human and hollow)

- Orihime awakened her powers, which in my opionion is fullbring aswell.

- kisuke did some hollofication stuff

- aizen did some hollofication stuff

- aizen created arrancars

- biggest one: aizen hollofied, even though he said, that he wouldn't do that. Why would he hollowfy? At that point yamamoto was beaten and he was stronger than anyone who was left. Afaik his objective was to destroy the soulking and not getting as much power as possibly. Pretty sure he was stronger than 0 squad without it.

Thus I think it's power is solely to control the boundary between Shinigami, Hollows and also humans. 