ビィビィ

BB is a character ressembling Sakura Matou in Fate/Extra CCC and is one of the antagonist in the game.

BB is a backup AI created by Sakura containing her feelings for Hakuno Kishinami. She is said to have created the Sakura Labyrinth, and later created both Meltlilith and Passionlip. who resemble her and Sakura.