She rose to prominence after becoming a grand finalist on Tawag ng Tanghalan Kids in 2017 alongside TNT boys.

Belarmino was a member of the all-female vocal group New Gen Divas along with Elha Nympha, Zephanie and Janine Berdin.

She was hailed as the 4th placer and became the only female grand finalist against all other male contenders including the TNT Boys in which John Clyde Talili emerged as the winner.

[6][7][8][9] Belarmino also impersonated Darren Espanto, Whitney Houston, Chris Brown, Jennifer Lopez, Nicki Minaj, Regine Velasquez, Ariana Grande, Jessa Zaragoza, Sharon Cuneta, Olivia Newton-John, Donna Summer, Alanis Morissette, Miley Cyrus and Ariana Grande (together with AC Bonifacio), and Beyoncé.

[11][12] Belarmino was previously part of a Sing and Dance girl group called Just A.S.K., together with AC Bonifacio and Krystal Brimner.

In April 2021, ASAP formed a singing group called the New Gen Divas, in which Belarmino is a member along with Zephanie (later replaced by Fatima Lagueras aka Fana following her transfer to GMA Network in 2022), Elha Nympha, and Janine Berdin, with Sheena representing the color yellow in the group.