Wanigawa Raifu

Raifu (雷斧) is a character introduced in Toaru Kagaku no Railgun. Initially appearing as a competitor in the jailbreak trial, she is later revealed to be part of a group who used the event to engineer a real jailbreak.

Appearance
Raifu is a little girl with light hair. She wears a top with baggy sleeves.

Personality
She presents a facade of helplessness and cowardice, influencing people to come to her aid. However, as Yamashiro Shoubu has noted using his power, she reeks of malice, which is proven later by her vicious beating of him.

Background
At some point, Raifu became part of a group with Kimi, Tsurigane and Aohoshi. Kimi was captured and imprisoned in a private juvenile hall, so the others plotted to break her out and to find a skilled hacker as well. Raifu and Tsurigane would take part in a jailbreak trial taking place at the juvenile hall. Raifu's role was to take out any powerful non-hacker competitors.

Jailbreaker Arc
Raifu was a participant from the very beginning of the competition, and likely took advantage of Misaka Mikoto and the others creating an opening in the outer wall of the facility. Inside the girl's building, she met Yamashiro Shoubu, who wears a tanuki mask which she constantly mistook for a bear, while fleeing from guard robots. Raifu took advantage of him, allowing him to bear the brunt of the facility's security system.

She was later separated from him and chased by centipede robots, coming across Mikoto's group as they are surrounded by more robots. However, she snuck past them and went off without any of them noticing where she went. Her whereabouts were unknown for the remainder of the trial, which ended with Uiharu Kazari successfully hacking the facility and breaking out the target prisoner, who had actually been switched with her imprisoned comrade Kimi.

During festivities afterwards, she encountered Yamashiro Shoubu again and was asked to follow him into a secluded area. There the 'masked hero' threatened her with his wooden sword, sensing how she reeks of malice. Not long afterwards, she beat him up, showing her true colors. She later met up with Aohoshi, Tsurigane and Kimi in an abandoned building, happy that the latter was finally free.

Raifu plays cards with Kimi and Tsurigane. Aohoshi then tells them that she has found the registration data of the winner, Uiharu Kazari. The girls are amused on how she was able to hack the system. Raifu comments on how Uiharu was with the Railgun, which suprises Kimi when she is informed that the Railgun is the third-ranked Level 5, and there are now seven Level 5s in the city since she was incarcerated. Kimi eventually wins the card game.

Abilities
Little has been shown of Raifu's abilities, but she was able to defeat Yamashiro Shoubu after he picked up on her malice. She was also able to take out many of the competitors in the jailbreak trial without them noticing.