Josui (如水) is a playable character from the Senran Kagura video game series. She makes her debut in Senran Kagura: New Wave. A member of the idol group Milky Pop and a 2nd year high school student. Her sense of justice and responsibility are strong, dragged along by Mai and Tamaki she became an idol. Worrying about their identities being discovered, she's always bracing herself for that moment. Because of that she's very sensitive to other ninja's presence.
Her fighting style involves knocking down enemies by manipulating her flexible ribbon.
Josui has a fair complexion with dark green eyes and long, pale brown hair worn with a blue maid brim.
As an idol, she wears an eye-catching costume composed of a white tube top with pale blue coloring in the front. Her two layer blue skirt is frilly with a white belt clipped with a heart. and a frilly, two layer blue skirt adorned with a white belt and clipped by a heart. On each wrist is a white cuff lined in red with a single blue button, while at her neck rests a blue bow attached to a white collar. Her light blue shoes have a white loose flap and heel, worn with sheer tights.
- Josui's name can be translated as "Draining", however the kanji of her name (如水) can mean "Water".