Rosibel Carvajal was born in Heredia, Costa Rica, in 1966. Daughter of Soleída Chavarría and Álvaro Carvajal, she showed an early inclination for the arts, participating in dance, acting, and school parades. Despite struggling with stuttering, her mother, following the advice of her school principal, encouraged her to sing. This not only improved her speech but also her other artistic abilities.

In 1984, Rosibel entered the National University of Heredia, where she studied International Relations, earning her bachelor's degree and pursuing a licentiate with an emphasis on international politics. She later studied journalism at the Latin University of Costa Rica. Additionally, she developed her talents in painting and sculpture at La Casa del Artista and trained in playwriting with renowned figures like Sanchís Sinisterra, Fernando Marías, Jeannette Rodríguez from Planet Films, and Costa Rican Walter Fernández.