[spoiler discussion]Need help with Arc 6

What was Rui's plan? As far as I've understood, Subaru meets Rui- Rui eats memories- Inserted a part of her self as a form of WF of gluttony in Subarus hollow body- Does horrible stuff to him like Killing meili to "seperate" him from Natsuki Subaru so that she can consume his WF. Basically moulding him into someone else, so that the WF doesn't cling to him or smth. I've seen another theory about how it wasn't Subarus body at all, but was Solar eclipsed body of Rui. Which one is correct? Also, Is it true that Subarus memories kept on regenerating itself when Rui ate them, and one of those copies was the memory he saw in his last visit to Odo Ragna?