As the third and youngest daughter of the rich family that owns Rasen Advertising, her usual rich way of living gets spoiled by her being forced to go to a all girls boarding-school. Doris is also a Panzer and can transform at will into the Drill Princess. The name comes from her using a drill as both a weapon and a fashionable hat, though no one else seems to think that her Panzer-suit is fashionable.
