From South Los Angeles, Proby showed a talent for writing from a young age, composing poetry and lengthy letters to her father when he was in jail.
[2] Unusually for a female writer, Proby writes primarily for male rappers, but has been praised for successfully "getting inside the heads" of artists and working closely with them to compose songs that match their personal styles.
[2] In 2015, she guest performed alongside Ty Dolla Sign on Puff Daddy's single, "You Can Be My Lover" from the latter's commercial mixtape MMM (Money Making Mitch).
The following year, her appearance in the video for the track, as an unexpected "butch lesbian leading the song, rapping about hollering at women in the middle of a misogynistic smorgasbord,"[12] became a breakout performance for Proby.
[2][13] That same year, she received numerous songwriting credits on Ty Dolla Sign's debut album Free TC, including for the single "Saved."