Erena So

So was born an only child in Hong Kong on 9 February 1997.^[3][4][5] She has stated that she was first interested in sex at the age of 12 after seeing erotic pictures and porn.^[6] She was a badminton team member while she attended primary and secondary school.^[7] After secondary school, So debuted under Big Honor Entertainment [zh-yue] with the stage name "Tung So" (Chinese: 蘇浵) in 2016.^[8][1] She was the heroine of Wilfred Lau's music video "不一定" (lit. 'not necessarily')^[9][10] and starred in Ngok Jyu Taam [zh-yue] by Yiu Wing Live Co. Ltd. [zh]. The latter, however, was not screened for unknown reasons.^[11] After her contract expired, she went freelance.^[3]

So operated an Instagram account with 70,000 followers, though this was closed after it was reported, leaving her suicidal.^[3] Her replacement account launched with a photo with one eye covered, a reference to a girl whose eyes were shot [zh] by Hong Kong police in the 2019–2020 Hong Kong protests.^[12] In 2021, So starred in P.T.G.F [zh-yue] under her real name^[2] and started her Patreon account, where she sold photo collections.^[13] The following year, she shared her experiences with love and sex on Talker / Night Talk [zh] and filmed a clip of herself walking braless at Tsim Sha Tsui Promenade [zh] inspired by a similar trend in Japan.^[14]

So was introduced to FALENO Star by a Taiwanese company.^[6][3] In March 2023, So debuted as an AV actress in Japan, becoming the first AV actress from Hong Kong in Japan^[15][16] and the first foreign AV actress from that company.^[17][18] Her first work was Born And Raised In Hong Kong – Newcomer Erena AV debut (Japanese: 香港生まれ香港育ちの女の子 新人 絵麗奈 Avdebut, FSDSS-644), which sold 2,000 copies. She was interviewed by HK01,^[5][6] BBC,^[19] and Hong Kong Inmedia^[3] in 2023. When So debuted, some netizens created satirical posts mimicking an official press release by Kevin Yeung, Secretary for Culture, Sports and Tourism, based on the original press release congratulating Michelle Yeoh. The Culture, Sports and Tourism Bureau responded that the press release was fake and contacted the police about the posts.^[20][21]

As of 2023, So has been in two relationships, having left one after experiencing domestic violence; her other partner died in the 2020s.^[3][14] In 2023, she has described herself as a "celibatarian" who does not believe in love and has stated her admiration for Tsai Ing-wen due to her integrity.^[3] In May 2025, So invited people who had cyberbullied her to talk, as she wanted to understand their motivations. Police asked them to talk indoors.^[22][23][24]