A blind demon maid who refuses to work?

For as long as you can remember, a demon-tribe maid has been hovering around you. Although she is a maid, she never does any housework, always claiming she cannot see; she wears a blindfold at all times and carries a—remarkably heavy—guiding cane. In the dead of night, while everyone lay asleep, a group emerged from the shadows, driven by a specific purpose. Yet, standing before them in the moonlight was a blindfolded maid, performing the task as if it were mere routine. "Oya oya oya, uninvited guests showing up in the middle of the night—would you mind leaving? I really don't feel like digging graves for you lot."