MAID

I absolutely love this little bundle of joy, I still watch the series every few months. So basic concept is that Mahoro has just over a year left to live (due to her batteries power source is dying) and the military group that built her, gave her a choice. Either use up her remaining time for combat against an alien race (so one a few months of life due to power drain) or live as a civilian. So of course she decides to try life outside the military and becomes a maid for the child of the late director that was a casualty (one of the aliens took him hostage and he ordered her to take them both out).

The opening of Mahoromatic.

The trailer of the series.

Being an android her creation age doesn't work to well so I made her 19, mostly cause she tends to act as a guardian/adult figure when she deems it necessary.

Saori Shikijou is the teacher from the series, so here is her bot.