Bianchi is Gokudera's older half-sister, as they share the same father. Bianchi, known as "Poison Scorpion Bianchi" or simply "Poison Scorpion" in the Mafia world, specializes in Poison Cooking, a technique that turns any food she makes into poison, regardless of whether or not it's intentional. Bianchi herself is immune to Poison Cooking and believes that she is quite an excellent cook. She is in love with Reborn, who was a former associate of hers, and wants to kill Tsuna to free up Reborn's schedule; however, she refuses to kill him for the benefit of others.