They're looking for Asian teen to guest star on an upcoming three-episode arc as "K. Tran," a "brilliant, high achieving teenager." Take that to mean whatever you want.
It looks like they've left open the character to be either a guy or a girl (does it not matter, as long as he/she is Asian?). Here are some more details:
SUPERNATURAL, Episode #721, "Reading Is Fundamental"If you're an actor in the know, and you fit the bill, you've probably already had your agent submit for this. That said, I hope whoever gets this part can create something cool out of this opportunity. I guess we'll see. (Thanks, Edward.)
Episodic
Studio: WARNER BROS.
Network: CW
Executive Producers: Robert Singer, Sera Gamble, Phil Sgriccia, McG
Creator: Eric Kripke
Director: TBD
Writer: Ben Edlund
Casting Directors: Robert J. Ulrich, Alex Newman
Shoot dates: 3/15-4/18 (dates are for all 3 episodes)
Location: Vancouver
SUBMIT ELECTRONICALLY
[K. TRAN] ASIAN, Please submit BOTH Male AND Female teenagers. (actors must be 16 years and over to play 15). A brilliant, high achieving teenager, his/her world is suddenly turned upside down when he/she unwittingly becomes a prophet of sorts. RECURRING GUEST STAR, Three episode arc appearing in 721,722 and 723
UPDATE: I should explicitly say that if you're an actor who's interested in the role, I don't know how to submit for this, so please don't bother asking me. Hopefully, your agent is doing his or her job and you'll get a shot.