Constellation:

Character:

Archer is the Servant of Rin Tosaka. He is sarcastic and cynical, considering Shiro's mentality of "wanting to save everyone" as naive and impossible. Archer is actually Shirō Emiya from the future. He is ultimately the winner of the fifth Holy Grail War, and is a living incarnation of the "Hero of Justice".
Archer is a Faker, an individual skilled at creating imitations of objects through the use of tracing and projection of mental images to form tangible objects.He is also skilled in the basis of both Alteration and Tracing: Reinforcement; the art of temporarily strengthening the construction of objects through the understanding of their nature and perfection of defects in their structure.

Source from Wikipeida