We go from isekai maids to robot maids as I dig up this forgotten bit of nonsense from ADV's manga division.
STEEL ANGEL KURUMI (Kotetsu Tenshi Kurumi), by Kaishaku. First published in 1997 and first published in North America in 2003.
PLOT:
In an alternate version of the Taisho era, Dr. Ayanokoji is on the run. The army wants to seize his plans for his "Automated Dolls," and he's willing to do anything to protect them. Nakahito is a cowardly young orphan who happens to stumble upon Dr. Ayanokoji's hideout in the middle of a dare. He awakens one of his Dolls with an (accidental) kiss, and she pledges her eternal devotion to him. Now Nakahito has a robot maid who will protect him from anything, including her mechanical 'sisters' and those who would wield them as super soldiers.
