What type of details about kalafina can be gathered from the following bio? Bio: kalafina is a japanese vocal group formed by the composer yuki kajiura in 2007 , mainly to perform theme songs for the anime '' kara no kyokai '' . the group first appeared in january 2008 with two original members from yuki kajiura 's fictionjunction project , wakana Otaki and keiko kubota -lrb- not confirmed until the first dream port 2008 concert held on april 29 , 2008 -rrb- . in may 2008 , two vocalists maya and hikaru , who had been chosen from an audition held by sony music japan and yuki kajiura , were confirmed as the final members of kalafina .
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