An angel assassin from the future who ends up trying to save her target. She uses her magical weapon Excalibolg to bring misery into Sakura's life.
Dokuro is an angel from the future sent to assassinate Sakura Kusakabe - a to-be-pedophile in the future - who ends up developing a way to stop the aging of girls at the age of 12. Instead, Dokuro goes against her mission and spares Sakura's life, as well as saving him multiple times from other angelic assassins.
Dokuro possesses a large spiked club called Excalibolg, which she frequently uses to brutally club victims to death. With a wild and unpredictable personality, she will often rip Sakura to pieces - usually for fun, accidently, or even for mild embarrassments - only to resurrect him with her magic spell seconds later.
Using her magical powers, she often turns anyone who gets in the way of her relationship with Sakrura into human beings with animal heads, as well as completely erasing some from existence. Dokuro will also often tease Sakura or even sexually seduce him in many situations.
Dokuro is also shown to have knowledge and skill in the art of torture. An example of this would be when she tortures her own teacher in order to get approval for her club, as well as hardening glue onto Sakura's body parts to get him to join.