I can see why robots or at least the Mina series would be a common second-hand item now. There are limitations to what they can do and if they perform outside of their "intended use" they start playing ads to get you to pay more for updates that arent necessary. The robot is always calling home...
@newmangareader246
It's his disguise to see Mika without being identified as her neighbor. She already knows it's him, but him taking it off is confronting her about everything.