First appearance: Battle 71

Type: Dou

Type: Katsujin Ken

Martial Arts: Weapons

Number 20 is Loki's underling, and later becomes a spy for the Shinpaku Alliance with him. Like her master, 20 is very underhanded and resorts to any methods in order to win, even hurting innocent children like Honoka. It is also implied that she has romantic feelings for Loki, despite his occasional mistreatment of her.

Number 20 is a young woman with short unkempt brown hair and a fairly endowed figure. She is normally seen in a yellow A-shirt and suspenders and has a type of goggles on with night vision seekers on it and has an air machine gun with her. She also seems to have some type of markings on her body that are green that seem to be camo make-up.

She first appears during Loki and Siegfried's abduction of Niijima in order to break up the Shinpaku Alliance. Nijima, who overhears their plot, grabs 20's breasts to escape but is still captured by Siegfried. She later fights Miu on a truck driven by Number 43 and gains the advantage with her gun and prong. However, Miu got up due to her training and gave her a well desired punch in the stomach, defeating her.

She later takes Kenichi's sister Honoka hostage and threatens to kill her if Kenichi attempts to fight back against Loki. This continued until Tanimoto Natsu knocks her out and rescues Honoka, allowing Kenichi to defeat Loki. In the final battle with the Shinpaku and Ragnarok, she aids Loki and his new eight fists in his attempted coup d'état, but they are defeated by Berserker, after which they disappear for the remainder of the battle.