D4 Princess

D4 Princess (D4プリンセス, D4 Purinsesu) is a Japanese manga series created by Shotaro Harada. An anime adaptation produced by Daume Studios, ran from April 6 to September 28, 1999.

Plot
Doris Ruridou is a young princess who had just entered Teito Academy, a school for training Panzers, persons with special abilities and fights with a weapon called "tools". Shortly after entering, her older sister shows up to teach her how to fight as a Panzer against other Panzers who challenge her.