Nejiru Gaou

The second-year student whom Doris regards as her dream opponent, as she is the first panzer Doris encountered in Doris' first day in Teito. Nejiru is feared by other panzers not because of her skill, but because of her destructive power. Her name literally means "to twist" which explains why she, like Doris, uses a drill as a weapon. She is billed as "Bloody Drill".

(Source: Wikipedia)