Claudio

Claudio was a member of the Fiamma Nera cult. He set up a camp outside the entrance to the Temple of Xian where Lara would later be ambushed by him. The ambush failed though, Lara repelled him and aimed her Pistols at him. Claudio explained about the Dagger of Xian and the leader of his cult, Marco Bartoli. For speaking of all this he poisoned himself. Lara then explored his laptop and found out about Gianni Bartoli and Venice.

Tomb Raider II Starring Lara Croft
Ambushing Lara at the Temple of Xian entrance
 * "With a tommy gun on my key-ring."
 * "Somehow you don't behave like you've got a monk's blood."
 * "These doors are waiting for the right one, the right time to arrive, and then the Dagger's blade will honor the hearts of those who believe. So unless you pledge your loyalty as well."
 * "To the sins and fortunes of Marco Bartoli!"

Trivia

 * Claudio poisons himself in the first cutscene. Later, when Marco performs a ceremony one of the followers there look like Claudio.