That's a nice future, with that level of capability and miniaturization(we're far from it yet). Of course, unless they're crazy I expect some mandatory Asimov safeguards built into them. With an override switch. Just in case. ...And preferably also ban them from building their own robots. Or applying mind patterns on existing ones...
It's strange how a happy ending is the usual twist for a manga with sapient robots. It's usually about bittersweet sacrifice.
Thankfully though, this one is the former.
The placement of that wind-up key would prevent her from looking up. Also, those external joints would easily become clogged with dirt, or worse yet, pinch small fingers. Very poor design choices for a teaching robot.