Цумуґія Уруру

Ururu's meek attitude is somewhat at odds with her fighting ability, which is undefined, but quite high (Urahara vaguely mentions that her fighting ability is at an "anti-shinigami" level). Her leg-strength in particular is far greater than it should be, even when compared to Kon while he's in Ichigo's body. Her combat skills are shown when she gives the arrancar Ilfort Grantz a devastating kick to the head while he is fighting with Renji Abarai, overpowering him to the point that he is forced to release his zanpakutō. In the anime, she also delivers a powerful kick to Sawatari's giant whale doll, Baura. (Source: Wikipedia)