It is pronounced "KURARISSA". (Consonants are pronounced more or less the same way as in English. "A" sounds like a in father, but shorter. "I" sounds like ee in meet, but shorter. "U" sounds like oo in hook, but with less rounding of the lips.)
Find your name in Japanese.
I'm actually shocked my name was in their database.
EDIT:
I finally saw the last episode of .hack//Legend of the Twilight Bracelet last night. *kicks them* I hated it.
And it's times like these I wish I could draw. I'm on "The World" overload and I want to draw a player character. But I can't draw. *cries*