It was stated that she is no robot, but maybe our robots are just too primitive and limited to match her.
Regarding emotions: why would she need those ?
There is no need for hunger, fear, love etc.
I could see curiosity, so she goes to see interesting things and events.
Same for her interest in humans, i.e. as supporting her "mission".
Also, without spacetravel, she will not meet others of her kind.