User blog comment:B214/Question and Answers 4/@comment-4547267-20141123021837/@comment-4320546-20141126202047

He said split not cloned. What 15sok is trying to say is if Rias spilt into several Rias, she would have a different part of her personality become the primary of the multiple Rias.

Like, Main Rias split into four. One Rias would have the oneesama persona, another would act like a regular girl like when the original sometimes does around Issei, the third would turn into a pervert, and the last would be the Japan otaku.

I forget the exact thing he's referencing, but I've seen it enough times to know what he's talking about.