Seraph (The Matrix)

Seraph
The Matrix character
First appearance	The Matrix Reloaded
Created by	Wachowski Brothers
Portrayed by	Collin Chou
Information
Species	Computer program
Gender	Male
Title	Guardian of the Oracle

Seraph is the name of a fictional character in the films The Matrix Reloaded and The Matrix Revolutions. He is described as the personification of a sophisticated which guards the Oracle. He is portrayed by Collin Chou. As a challenge handshake authentication protocol, Seraph is effectively a login screen that fights the user to authenticate their identity.

The role was initially offered to Michelle Yeoh, but she declined due to a scheduling conflict. The character was changed to a male, with Jet Li being offered a role. As Li declined the role, Chou signed on.

In The Matrix Reloaded and The Matrix Revolutions, Seraph is seen acting as a "guardian angel" of the Oracle. He refers to himself several times as "Seraph, Guardian of the Oracle", but in actuality he has held this position since long before the time frame in which the first film takes place. We also learn from a scene later in the film that Agent Smith has tried to hunt him before, but that Seraph confounded him in these attempts.

Over the course of the Reloaded and Revolutions plot arcs, he has three brief altercations with warriors of Zion. The first is with Ballard, which he stages in order to get to know him; the second, with Neo, to prove he is the One. The third takes place in the closing stages of Enter the Matrix, after the conclusion of Reloaded but before the beginning of Revolutions. Seraph summons either Niobe or her First Mate Ghost to meet the Oracle. Whoever he summons, he first tests that person with another battle, in order to "test his/her heart's resolve" (or, more technically, a Challenge-response authentication).

...
Wikipedia