User blog:Yoloswagyoloblazeit420/Annie wasn't with Bert, Riener and Marcel in the manga

Well I was reading chapter 47 again and I noticed something in page 6, well we do know about Bertoldt and Riener and their mission about "Wipe the humanity", and they had a comrade named Marcel ( was called Berwick) that we found out before that Ymir ate him in her titan form, the scene shows only Bertoldt and Riener running, where do you think Annie was at that time ? when did she join them and how did they travel to Wall maria at age of 8 or 10 and they are in human form ?