[Tom Bombadil]

Originally Posted by KiRa08o2

^ I rather think that she's some kind of illusion created during the 3 "blank" years Kamito had. Like, maybe a data transfer or something.

Spoiler for Claire's sister:

Spoiler for only for those who are update with the current volumes:

Sorry to disappoint you. But I believe n0m@n is right. There are several clues for this. There is one scene where the fake Ren is described as having red eyes or hair. Probably one scene where she even used fire magic if my memory serves. Another clue is that Restia said that the fake Ren specifically instructed that she was not to hurt Claire.