Board Thread:Questions and Answers/@comment-27836345-20170522032737/@comment-25065646-20170525120749

"Orihime and her brother, Sora Inoue, were raised by a drunken father and a prostitute mother, who always argued and beat their children. Fearing that their parents would kill Orihime, in the March that Sora turned eighteen, he ran away with Orihime, who was three years old, and raised her on his own from then on."

I'd say it's pretty unlikely. I'd say it's implied that Memory Chicken only works on normal humans, while Orihime already possessed traces of reiryoku at that point so naturally she would resist it. As for her powers, as far as I know the only theories we have for them as of now are that they're - just an odd kind of Fullbring - purely granted by the Hogyoku as Aizen stated