The two work as assassins (Turks) for the Shinra company. Though it is stated in the game by another Turk (Reno) that Elena has a crush on Tseng, her feelings don't seem to be
reciprocated in the game. In the CGI sequel,
Final Fantasy VII: Advent Children, Tseng and Elena work together and it is unknown if any type of
relationship, other than professional, exists between them as Tseng's previous love interest (Aerith/ Aeris Gainsborough) was killed in the game. As Elena's attraction for Tseng was actually present in the game, Tselena is considered a canon/ semi-canon pairing in the Final Fantasy fan base.