Karis studied at Centrestage Performing Arts (Showfit) in 2016 before commencing training at Victorian College of the Arts, graduating with a Bachelor of Fine Arts (Music Theatre) in 2019. She was a featured vocalist in Woodstock: 50th Anniversary as a part of the Melbourne Cabaret Festival in 2019, as well as in Morning Melodies (dir. Jayde Kirchert), which was presented by Arts Centre Melbourne. Shortly upon graduating university she made her debut at the Sydney Opera House as a Swing in the first Australian cast of SIX the Musical. In 2020 she was a semi-finalist in the inaugural Artists of Colour Initiative before returning to the stage in Yve Blake's critically acclaimed FANGIRLS (Belvoir) 2021, in the principal role of Edna.