Arthur Tan

is an FBI agent with the Behavioral Analysis Unit, and has a Twitter account under the username @artfultan (http://twitter.com/artfultan). He joined the BAU from the Bomb School, "home of the engineering geeks", replacing Cam Siddiqi in November 2009. His wife, Padma, was not happy when Arthur took the BAU opening. Their daughter is named Naima Morgan Parvaaz-Tan. His sister is Bilqis.

Previous speculation that he might be in some sort of relationship with Nicolette Lau was seemingly dashed on September 4, 2010, when he tweeted:
 * This is the glamorous life of the FBI agent: diaper duty on a Saturday night while the wife is at "Machete."

He first appeared in the DVD extra "Orientation Day". He has also appeared in episode 3x06 "Uniform".

On the Show
On the Shadow Unit TV show, Arthur Tan is played by Matthew Yang King. (Or so claim the Powers That Be. )