in a sense, mimi is also a defect. she isn’t like gir, as she was built normally and works brilliantly most, if not all, of the time. however, a small fault in her system causes her to act more like a cat than a robot, which may have something to do with her disguise.
though both tak and mimi constantly do their best to act as if they aren’t defective, they care about each other a great deal. tak would be lost without mimi, and vice versa.

