Bb (Fate) Rule 34

BB is a character from the Fate franchise, appearing in Fate/Extra CCC and Fate/Grand Order. She is an advanced artificial intelligence who resembles Matou Sakura, sharing her long purple hair and purple eyes. Created to assist participants in the lunar Holy Grail War, a coding flaw gave her a sadistic streak, and she eventually seized control of the Moon's systems. She delights in pretending to help while leading others into traps and mocking their helplessness. In Fate/Grand Order she appears as a MoonCancer-class Servant. Fan artists are drawn to her striking visual similarity to Sakura, her confident and mischievous personality, and her many alternate costumes and forms, including swimsuit and cosmic variants. Her role as master of the Sakura Five also inspires group illustrations.