Origin
Katie is the younger sister of Deborah Giacomo and youngest member of the Giacomo crime family.
Creation
Katie was created by Mark Waid for his series Daredevil.
Major Story Arcs
Daredevil- Man w/o Fear
Deborah Giacomo and Vincent Petrocelli are getting married and joining two of New York’s biggest crime families together, but Spot has plans to sneak in and, with the help of Sal Donoratti kidnap little Katie as she walks down the aisle as the flower girl. The plan would have worked but Daredevil gets wind of it and crashes the wedding. He catches Katie just before she falls into one of Spot’s holes. He then hands off to Vincent before taking down Spot.