Bianchi is Gokudera's half-sister; they share the same father. Bianchi, known as "Poison Scorpion Bianchi" in the Mafia underground, specializes in poison cooking. Since she, herself, is immune to her own cooking, she does not see anything wrong with the food she gives others. She is in love with Reborn, who was a former associate of hers, and wants to kill Tsuna to free up Reborn's schedule, though refuses to kill him for the benefit of others.