Tiffany Yuen Ka-wai (Chinese: 袁嘉蔚; born 30 September 1993) is a Hong Kong activist and politician, who has been a member of the Southern District Council for Tin Wan since 2020.

[2] For her participation in the 2020 Hong Kong pro-democracy primaries, she was arrested in January 2021 along with over 50 other pro-democrats on national security charges and remains in jail as of October 2021.

She was dedicated to activism during her student life, including Yuen's participation in the 2013 Hong Kong dock strike and the protests against the North East New Territories New Development Areas Planning.

[7] In light of Demosistō members losing their candidacy due to their promotion of "democratic self-determination", Yuen left the party in 2018 to continue her community services in Tin Wan Estate as an independent.

[16] Yuen ran in the 2019 District Council election for the Tin Wan constituency, where she pledged her commitment to improve the living conditions of the local residents.

[23] On 30 July, Yuen was told her election nomination was 'invalid', as one of a dozen pro-democracy candidates disqualified on the same day, including Demosistō founder Joshua Wong.

[27] On 28 February 2021, Yuen was arrested again and charged with "conspiring to subvert state power" along with 46 other activists and politicians under the national security law.

[32][33] In August 2020, Yuen launched a YouTube channel called "Faan Hou ABC" (番號ABC) with fellow activists Lily Wong and Ho Ka-yau.