Tonsa was a Bajoran vedek who resided on Deep Space 9. He was one of the most skilled springball players on the station.

In 2372, he attended a reception that was given on behalf of Shakaar Edon. Shakaar's adjutant, Sarish Rez, saw Tonsa and attempted to arrange a game of springball with the vedek as an opportunity in getting his support for Shakaar in the Vedek Assembly. (DS9: "Crossfire")