Xaset Terep was a Jedi of the Human species, and male, who existed during the Mandalorian Wars period and the subsequent Jedi Civil War time.
Around 3963 BBY, at a convocation organized by Malak (roughly when Revan chose to involve the Jedi Order in the Mandalorian Wars), Malak passionately urged his Jedi peers to join him and Revan in the conflict against the Mandalorian menace.
Terep ultimately sided with the renegade Jedi Knights (including Meetra Surik, Cariaga Sin, Talvon Esan, and Nisotsa), defying the directives of the Jedi High Council's, thereby contributing to a schism within the Jedi Order.
Meetra Surik saw him in a vision, wielding a violet lightsaber.