I presume the poster meant Santa Clarita.
As others have stated, the area is diverse, though possibly not as diverse as, say, Los Angeles. In other words, the majority of the population is Caucasian, followed by Hispanics, but other races are pretty well represented, too. With your reference to Asian markets, I'll add that I've seen many Asians in my travels around Santa Clarita, and I know a few that live there.
If you're looking to work for Princess Cruises, their offices are next to the Valencia Town Center Mall. There is rail service to Santa Clarita, but you'd need to take a bus from the train station to the Town Center Mall to make your connection. I'm sure Santa Clarita Transit has buses that will accommodate this route. There are two train stations near there, one to the south in Newhall, and another to the east next to what was once Saugus Speedway. I don't know the routes or schedules, but I think you might have a better chance of making the connection at the Speedway station, since it's a pretty straight shot (west on Soledad Cyn. & Valencia Blvd.) from there to the Town Center Mall.
edit: I just checked this and found Route 501 connects from the Santa Clarita (Speedway) Station to the Valencia Town Center, which would be your link to the train station.
The best bet, though, is to live in Santa Clarita if you're going to be working there. It's easier to get through the Newhall Pass (south of Santa Clarita) on those occasions that you want to go to L.A., than it is to do this everyday. I travel through the Newhall Pass on a daily basis (southbound in the morning - usually ahead of the crowds), and the travel isn't too bad going the other way in the morning. In the afternoon, though, it's a different story. The southbound traffic on I-5 is backed up to Magic Mountain Parkway on a regular basis at about 4 or 4:30 P.M. I would definitely suggest using the train if you choose to live south of the Santa Clarita Valley.
Train info can be found at
metro.net | Transit Services and Information for Los Angeles County
Here's the bus info for Santa Clarita (look specifically at Route 501):
City of Santa Clarita, CA - Transit
I hope this helps.
-Joe