When she was a high school student, her goal was to go to the Department of Theater and Film, and then to participate in plays.

The film is about a girl who survives a bus accident alone and is then bullied on social media, eventually becoming a real witch.

[8] In December 2020, it was reported that Shin was signed with the agency ANDMarq as a rookie actress.

[11] Plus X's modern Asian skincare brand Diponde announced on 23 June 2022, that it has selected new actress Cynthia as its main model.

[13][14] In 2024, MONGDOL, a brand that pursues natural minimalism, released a pictorial for its 2024 summer collection campaign with Shin.