What is the backstory of the character Sofia, and how does she fit into the John Wick universe?

Sofia, played by Halle Berry, is a key character in the John Wick universe. She is a highly skilled assassin and is known to be one of the few people that John Wick trusts. Her backstory is revealed in the third installment of the franchise, John Wick: Chapter 3 - Parabellum.

Sofia is a former member of the High Table, an elite organization of assassins that governs the underworld of the John Wick universe. She is also the manager of the Continental Hotel in Casablanca, Morocco, which serves as a safe haven for assassins. Sofia owes John Wick a debt, and in return for his help, she offers him safe passage to Casablanca.

Sofia's importance in the John Wick universe lies in her relationship with John Wick. She is one of the few people who is willing to help him in his quest for revenge against the High Table, and she is also one of the few people he trusts. Sofia's skills as an assassin also make her a valuable ally to John Wick.