I can't quite claim to understand it, since I'm not a machine myself, but that's how they viewed each other. [Naoto has a good memory, but even she's having trouble picturing the scenery how it originally looked when her eyes open. She begins moving with her eyes closed for the most part, opening them only briefly to make sure she's not about to run into anything and to catch her bearing.

The illusion tugs at her memory whenever she's looking at it, and it takes a few seconds to get back how it was supposed to be when her eyes close; Namine may notice then a brief pattern of short stops every twenty or thirty steps as she orients herself again.] She went back with her creators, to learn more about herself. Our groups are mostly independent, and she didn't have any reason to stay with us over people who could tell her more about herself.

There certainly wasn't any acrimony or animosity on our parts, it was simply just a matter of acquaintance. Had she stayed, I'm sure she would have wound up in our circle of friends somehow. Yu-senpai is oddly magnetic like that.