Kunai (weapon)

The Kunai is a recurring weapon in the Street Fighter series. It has been used only by ninja characters such as Guy and Ibuki.

Ibuki
The Kunai in Street Fighter is most commonly associated with Ibuki. Somewhat ironically though despite her high association with the weapon she only had one Special Attack attack dedicated to it and one Super Art that utilized the weapon in Yami Shigure. Instead her association was mostly established with posing with the weapon during some midround transitions, introductions, and winposes. Though later Ibuki started getting to use her Kunai more, usually in game specific attacks such as her Focus Attack in Street Fighter IV and she hitting her opponent with a Kunai in Street Fighter X Tekken with her Launcher.

Street Fighter V changed Ibuki's moveset to be more weapon focused thus increasing her reliance on the Kunai (though ironically also gaining a limited amount system in the process). Increasing her Kunai attack's utility with a new ground based attack (which isn't unlike Geki's ability to throw shiriken) and very different properties when using EX meter. Also gaining a throw system with Kunai Ikkinage where she throws all her remaining Kunai to maximize damage and Kunai Hoju to refil said used Kunai. Furthermore with alternate costumes Ibuki commonly gets Kunai asthetics, for example with her second IV alternate she has a chain of kunai around her jeans. In her Sporty V outfit on her clothes she has Kunai printed at her hips and at the back of her top. In her hidden Nastalgia outfit Ibuki's default top is removed and kunai she usually keeps hidden near her chest are shown.

Guy
Guy was seen to keep Kunai with him during his ending in Super Street Fighter IV. He used them as an intimidation weapon when M. Bison was carrying an unconscious Rose in his arms. Guy was never shown using the weapon however and his true proficiency with the weapon isn't known. In game he uses hand to hand combat and doesn't take out weapons even during his winposes. It should be noted that while in the original Final Fight while all playable characters were associated with a weapon Guy's was not a Kunai.

Unknown User
During Fei Long's original Street Fighter IV ending after Seth ends his speech he suddenly falls to the floor. On his back a Kunai is shown to have taken him out. It is not known who threw this Kunai, as the camera never shows who did it and Fei Long was in front of Seth the whole time, so he never would have had the chance to strike the area. Ibuki isn't a probably candidate as she is rarely in the main plot of games (and wasn't in this version) and it is commonly speculated to be Guy (though this has never been proven).