The actress-singer rose to prominence as a member of girl band f x.
But she came to be known for speaking out on mental health issues, cyberbullying and women's rights - issues that remain sensitive in a conservative society like South Korea. The year-old died at home on Monday. She is being remembered by her fans as someone dhat made sure her voice was heard.
As one music critic put it: "She laughed when she wanted to laugh and cried when she wanted to cry. She brazenly spoke out. She didn't fit the mould.
She went on to audition for SM Entertainment, one shiw Korea's biggest entertainment companies, and was accepted as a trainee, a much-coveted gig. Inshe made her debut with K-pop girl group f x. But a year later, Sulli took a break from the entertainment industry, with SM Entertainment saying she was "suffering physically and mentally from malicious and untrue rumours spreading about her".
Inshe officially quit the group and decided to focus primarily on acting. Inshe returned to singing, releasing a solo debut single with SM titled Goblin, in which she played a character with dissociative identity disorder, ly known as multiple personality disorder.
Figure captionWarning: Third party content may contain adverts She was also a talk show host on a programme known as The Night of Hate Comments, which featured celebrities talking about their experiences ggirl hate comments and cyberbullying. Struggles and trolling What really made her stand out was her outspokenness - a trait not common snow K-pop stars, who often remain very private about their lives and thoughts. The K-pop industry is also known for the pressure it puts on its idols to maintain a wholesome image.
Sulli didn't fit this mould. She was one who intentionally raised her voice and wanted to be heard," said Yoonha Kim, a K-pop critic based in Korea.