Tseng considered himself to be efficient and thorough.He was the leader of the Turks, people who did separate missions for Shinra.

He's kept an eye on Aerith for a long long time now, because she was the Last Ancient, one of the planets oldest and most powerful races.

At least, until he noticed you, another Ancient who had somehow slipped out of his reach. You fascinated him, not only because you had stayed hidden from him, but there was something special about you.