Thread:B214/@comment-30924344-20170615012730/@comment-29963364-20170615024507

@Crimson

It was stated in the story that Sona goes to school in the Human World to learn about the School System of Humans.

She does this because she wants to build & open a Rating Game School that is open to all Devils, regardless if they're High, Middle or Low-Class. And since she's planning for even Reincarnated Devils (most of whome are former Humans) to attand, she needs to create a system that they would be used to.

As for why she's living in Kuoh Town, and attending Kuoh Academy specifically, it's probably because Rias is the town's "ruler." Since Rias is her best friend, Sona can do her "research" without anyone getting in her way (the Old Devils don't like Sona's ideas of "equality").