TJ Mario Kasela, professionally known as Trio Mio, is a prominent Kenyan rapper and songwriter who rose to fame as a teenager. He is a leading figure in the Gengetone and Kenyan Hip-Hop scenes, often praised for his witty wordplay, rhythmic flow, and ability to bridge the gap between old-school Genge and modern sounds.

He gained massive national and regional recognition during the COVID-19 lockdown in 2020 with his breakout hit “Cheza Kama Wewe.” The song’s remix, featuring heavyweights like Mejja, Exray, and Nellythegoon, further solidified his status as a “prodigy” of Kenyan music.