Sofia Falcone is a fictional character appearing in DC Comics, primarily in association with the character Batman. Debuting in the 1996–97 comic book limited series Batman: The Long Halloween by Jeph Loeb and Tim Sale, she is introduced as a member of the Falcone crime family, who assists her father Carmine Falcone in unearthing the identity of the "Holiday Killer"—later revealed to be Sofia's own brother Alberto Falcone, a mass-murderer who had been indiscriminately killing Gotham City's citizens in correlation with holidays in the yearly calendar.
Cristin Milioti talks about the preparation she did to get into character as Sofia Falcone while chatting with THR at 'The Penguin'..