The Whirlwind Girl

• Hu Bingqing as Qi Baicao - An honest, humble and hardworking girl who has loved Yuanwudao since she was young. Her parents died in a fire accident and she was taken in by her teacher who she always supports and believes in. Though she hasn't had any formal training or experience, she initially starts competing in competitions for SongBai as a white belt and keeps working her way to the top with determination, becoming an exceptional and outstanding player in the female Yuanwudao community, earning the title, "The Whirlwind Girl".
• Yang Yang as Ruo Bai - He is BaiCao's senior at Song Bai with whom she trains with. With his help, BaiCao works her way to the top. He is shown to be stoic and cold with a hidden kind heart. He takes notice of BaiCao's huge potential. He falls deeply in love with BaiCao from the beginning and is willing to do anything to help her accomplish her dreams, however, he keeps his feelings to himself. Baicao initially sees him as her friend and mentor and is completely oblivious to his feelings for her. But in the end, she later realizes that he is the one who is important in her heart.
• Chen Xiang as Fang Tinghao - An international Yuanwudao champion and the current number one player, who is initially shown to be arrogant and flirtatious, yet has a kind heart. He develops an interest in BaiCao after meeting her for the first time and admires her skills in Yuanwudao. He soon falls deeply in love with her and gets jealous whenever he sees her with someone else. However, Baicao only sees him as an important friend and respects him as a senior.
• Zhao Yuannuan as Fang Tingyi - She is Tinghao's sister. A vain and arrogant girl, she is a Yuanwudao champion, and is regarded as "Moon Goddess", a superstar in the Yuanwudao world due to her talents and beautiful appearance. She likes Chuyuan, and is jealous of his love for Baicao. However, she later realizes her mistakes and encourages Baicao not to give up and continue to fight for SongBai. Fang Tingyi and Qi Baicao are like two sides of the same coin. Both are humbled by each other. When Baicao lost to Tingyi, she realizes that her strength alone isn't going to help her and that there is no shortcut to hard work, no matter how long it takes, thus she is humbled by Tingyi. Tingyi is also humbled by Baicao when she realizes that her arrogance isn't going to get her anywhere and that it shouldn't matter if Baicao reaches her level because she doesn't practice Yuanwudao just to keep defeating Baicao, rather she practices it because she loves the sport. She is also the only person besides En-Xiu who hasn't been defeated by Baicao.
• Bai Jingting as Yu Chuyuan - A former champion in the world of Yuanwudao who was number one. He quit Yuanwudao 4 years ago and is now a young medic. He is a humble and calm person and he too falls for BaiCao. Baicao likes him a bit initially but later realizes that she only sees him as her senior brother and close friend. The reason he quit the sport is revealed later on.
• Ji Chang-wook as Chang An (Season 2) - The original drillmaster at Yun Feng Hall. A cold-hearted person initially, he was the youngest Yuanwudao master and the youngest exceptional player. He was betrayed by his close friend at Yun Feng and kicked out of due to a leg injury due to which he can no longer compete in matches. He then becomes the coach at Song Bai and trains BaiCao so that he could use her for his revenge plan due to her skilled abilities but ends up falling in love with her.

• Leo Wu as Hu Yifeng

Ruo Bai's dorm mate. He appears to be lazy, but is very talented. He often bickers with Xiaoying, and later falls in love with her. He is good friends with Baicao.

• Tan Songyun as Fan Xiaoying

Baicao's best friend; who always supports Baicao in times of need. She is a cheerful and playful girl. She likes Ruo Bai initially, but later falls in love with Yifeng whom she often bickers with.

• Li Ze as Wu Xiuda: He initially disliked Baicao but soon comes to support her and becomes one of her close friends. It is hinted that he developed a crush on Baicao.
• Yu Haoyang as Wu Xiuqin: She too didn't like Baicao at first. Baicao had strong abilities, hence she was worried that Baicao might take her place, but when Baicao cheers and supports her during a match, she comes to like Baicao and supports her.
• Qie Lutong as Song Pingping: She is initially skeptical of Baicao coming to SongBai, but soon became her close friend.
• Li Ji as Yin Yin: She too was skeptical of Baicao coming to SongBai initially, but soon becomes her close friend.
• Gao Guangze as Yang Rui: He too didn't like the idea of Baicao being at SongBai, but later he becomes her close friend.
• Li Qiang as Master Yu: Master of Song Bai Yuanwudao Center and Chuyuan's adoptive father. He is a kind-hearted person and accepts Baicao as a student of SongBai at her master's request.

• Vincent Chiao as Qu Xiangnan

The former world champion of Yuanwudao; Baicao's master and Guangya's father. He started to look after Baicao during her childhood after her parents died in a fire accident. Due to an incident where he was framed for taking drugs, he was banned from the Yuanwudao industry. No one believes in his innocence except for Baicao, who sees him as her father and is willing to do anything to stand up for his honor.

• Yu Tinger as Qu Guangya

Qu Xiangnan's daughter. She appears to be cold but is actually very kind. She is Baicao's childhood friend and cares for her deeply.

• Feng Peng as Zheng Yuanhai

Current Master of Quan Sheng Yuanwudao Center.

This drama is highly recommended.

• Yang Tailang as Shen Bo: He is Ting Hao's close friend and usually serves as an informative during Baicao's competitions. He also often talks to Ting Hao about Ting Hao's love for Baicao and supports it.
• Wang Deshun as Master Wan

Master of Xian Wu Taekwondo Center and the Fang siblings' maternal grandfather.

• Shi Xiaoqun as Shen Ning

A talented Yuanwudao coach, who is the role model of many female students. She is also Guangya's aunt. She believes that Qu Xiangnan (the husband of her late sister) had taken stimulants to cheat and as a result, her sister had died from the shock. As a result she doesn't like Baicao initially because Baicao regards Qu Xiangnan as her master. However, she is surprised by Baicao's abilities and comes to appreciate her.

• Jiang Yiyi as Kim Min-joo

A Yuanwudao student from South Korea, who is frank and adorable. Due to her father's rivalry with Qu Xiangnan, she holds a grudge against An Yang students. She initially dislikes Baicao, but eventually comes to admire her abilities and her personality.

• Zhang Xueying as Lee Eun Soo (Li En-Xiu)

Chuyuan's half-sister. Eun Soo is a Korean Yuanwudao athlete, who is the current top player in the female Yuanwudao community, referred to as "Maiden Master" and is Baicao's role model. She is a kind-hearted and innocent girl who likes Tinghao. She likes Baicao the moment they meet and comments on her remarkable abilities. She is also the only person besides Fang Tingyi who hasn't been defeated by Baicao and is the only one who has defeated Fang Tingyi.

• Sun Lishi as Kim Yishan

Min-joo's father, and Qu Xiangnan's opponent. It is hinted that he may have used an underhanded method to defeat Qu Xiangnan back then to become world Yuanwudao champion.

• Jang Tae-hoon as Min Shenghao

Yishan's beloved disciple. A determined and upright guy, who became the runner-up at the Yuanwudao Youth Champion after Tinghao. He is close to Min-joo, and admires En-xiu.

• Li Jiacheng as Min Zai

• Huang Xiaolin as Mei Ling: A strong competitor whom Baicao defeats in her first Institute match. She was angry for being defeated by Baicao who was just a white belt then but becomes her friend after Baicao kindly respects her.
• Ma Chengcheng as Lin Feng: The second strongest female Yuanwudao competitor in China after Tingyi. She was defeated by Baicao in the quarter-finals of the Institute matches. She befriends Baicao after her defeat and supports her later on too.
• Yang Xiaodan as Xiao Ying's mother: A kind-hearted woman, who treats Baicao as her own daughter.
• Fu Jia as Xiao Ying's father
• Ma Ruojing as Pu Dongyuan, the person behind the drugs incident regarding Qu Xiangnan.
• Li Haohan as Li Yunyue: The Father of En-xiu, Yin-xiu and Chuyuan.
• Yi Ji as Shen Yuan, Qu Xiangnan's wife and Shen Ning's sister. She loved Baicao as her own daughter and used to look after her in her childhood. She died in childbirth which was just after her husband had been framed for taking drugs.
• Xu Huiwen as Ruo Bai's mother

• Highest ratings are marked in red, lowest ratings are marked in blue