concept: a ronin maid. a maid without a mistress. two possibilities:
- she thus can't do any actual cleaning, since one needs orders from milady in order to do anything like that, so she mostly just sits around being cute and gay, or
- vigilante cleaning.
You could make a VERY fun take on Yojimbo with Mary Poppins. A British village with two old families that have seen better days but still have a stranglehold on the town, and Mary arrives right after the last of the help kicks the bucket or hits the road... And she just moves between the two houses, helping them undo themselves.
Reproduce some of the sword fights but she slashes with her umbrella...