Kailee first began posting on her YouTube channel in late 2015, and started with covers of songs.

[4] She worked with producer CJ Baran to develop a final version of the song.

[6] In 2018, Morgue released the single "Siren" continuing the Greek mythology theme to her songs such as "Medusa.

[8][9] Atwood Magazine described Morgue's singing as a mixture of light and dark "like a dream within a nightmare, or vice versa.

"[10] Sydney Gore of MTV called Morgue an "emerging pop star" after the release of her EP, Medusa.