Li-Fen (リーフェン Rīfen?, Simplified Chinese: 丽芬) is a non-playable character who first appeared in Chun-Li's Street Fighter III: 3rd Strike ending and later in her Street Fighter V prologue story. She also appears in A Shadow Falls serving for F.A.N.G's back up plan for Operation C.H.A.I.N.S.
Li-Fen appears in Chun-Li's prologue story who asks Chun-Li about her yellow ribbons and her wristbands in the Alpha series. She was seen having her hair tied into unadorned ox-horns by Chun-Li while telling her story a few years ago until she finishes and she remarks about her hairstyle was great. Li-Fen also agrees to be trained by Chun-Li so that she will be stronger like her.
Li-Fen is revealed to be the daughter of one of the missing hackers who is assisted by two Shadaloo soldiers until they are beaten by Rashid. She also tells him about his friend's location as Rashid goes off but is unaware that his friend was killed by F.A.N.G using his poison attacks.
During the first infiltration of the Shadaloo base, she recognizes Chun-Li for carrying the Merope chess piece as she shows it to her with her mobile pad. After Chun-Li successfully abort F.A.N.G's plan, he warns then for making a back up plan while escaping. Li-Fen is later threaten by F.A.N.G to activate the back up plan.
In the final assault of the Shadaloo base, F.A.N.G threatens to kill Li-Fen when Rashid manages to abort his plan thanks to his missing friend's final piece. F.A.N.G is then beaten by Chun-Li, who saves Li-Fen. After Ryu defeats M. Bison, she was seen being carried by Chun-Li during the escape until they are reunited with the other fighters.
Li-Fen appears in 3rd Strike being kidnapped by Urien for his experiments which makes Chun-Li go rescue her. Li-Fen is later seen in Chun-Li's ending while helping her train the other kids to use Kung-Fu.