Yin and Yang

Ying and Yang were two loyal arrancar girls who serves Sōjirō Kusaka in the movie Bleach: The DiamondDust Rebellion. They appear to be twins, one of them has red hair while the other has blue hair. They are capable to use fire and electricity with the power of their respectives zanpakutō. They were sent to steal the King's Seal by Sōjirō in order to destroy the Seireitei.