|English||Heavy Performance Hollow Flash|
|User||Nelliel Tu Odelschwanck|
Cero Doble (重奏虚閃 (セロ・ドーブル), sero dōburu; Spanish for "Double Zero", Japanese for "Heavy Performance Hollow Flash") is a variation of the Cero technique. It is a signature technique of Nelliel Tu Odelschwanck.
According to Nnoitra, it is Nelliel's specialty. Nelliel absorbs an incoming Cero and fires one of her own while returning the previous one, thus creating a potent Cero Doble. While her child form severely limits her Arrancar powers, she is still powerful enough to absorb and redirect a Cero blast from a Privaron Espada-class Arrancar in his released form, though the effort seems to greatly tire her. In her original form, the force of the Cero Doble is augmented greatly, since she rebounds the attack while blending it with her own Cero, drastically increasing its power.