Quote Originally Posted by Sephitachi7
You are implying that Hojo was expecting Aeris to be rescued and this is why he didn't label her with a tatoo, which is not the case. I believe that Hojo did not think that anyone could break into the Shin-ra building and was not expecting it. So I think he would have carried out the experiment on Aeris like a normal procedure, thus giving her a tatto to identify her.
True, but he still had much more interest in studying than giving her a tatoo. Besides, Cloud was implanted with jenova cells, yet he never recieved a tatoo because no one ever got around to it. (No, it isn't because he was a failed experiment. Read the notes in the ShinRa Mansion library to find out that he was actually sucessful.)