Batou literally thought of his Tachikoma as his child.In the 16th episode of the first season, he's shown looking on as the 'komas are lead off to the lab but they're never outright mentioned again in the episode. Midway through the episode we get to see a faked photo of his cover identity's wife and kid (who looks an awful lot like Motoko). At the end of the episode he smashed both the bottle of liquor that was given to him "for his wife" and the bottles of all-natural oil that he previously gave to his personal Tachikoma. Taking into account his crush on the Major...
WMG / Ghost in the Shell: Stand Alone Complex