TV-Series
Description
Bianchi is an Italian freelance assassin known in the underworld by the nickname Poison Scorpion. She is the older paternal half-sister of Hayato Gokudera, sharing the same father but having different mothers.

Standing tall with a curvaceous figure, Bianchi has long, straight light pink hair and green eyes, which she shares with her brother. She has several tattoos, including a scorpion with a heart-shaped stinger on her upper left arm. After moving to Japan, she begins wearing orange-tinted goggles to prevent her brother from fainting when he sees her face.

Bianchi is generally calm and composed, presenting a cool beauty image, in contrast to her hot-tempered younger brother. However, she has a violent and reckless side when angered, and she lives very much in her own world according to her own principles. Love is the biggest driving force in her life, and she is deeply devoted to those she cares about. She treats younger characters like Kyoko Sasagawa and Haru Miura as younger sisters and is admired by them as an ideal woman. Conversely, she shows no mercy to those she dislikes, particularly anyone who reminds her of her deceased ex-boyfriend Romeo, which causes her to fly into a rage upon seeing the older version of Lambo who bears a striking resemblance to him.

Her primary motivation is her love for Reborn, who is her former associate and fourth lover. She initially comes to Japan intending to assassinate Tsunayoshi Sawada, believing that eliminating Reborn's tutoring job would free him to spend more time with her. After moving into the Sawada household, she remains as an art and homework tutor to live close to Reborn and eventually abandons her murderous intentions toward Tsuna. Over time, she becomes genuinely invested in the Vongola family and its success.

Bianchi's signature ability is Poison Cooking, a unique technique where any food she prepares, intentionally or not, becomes a lethal weapon. Different dishes have various devastating effects, ranging from melting metal to cutting through wide areas. Her ultimate technique, Violet Poison Deeper Crimson, allows her to turn anything she touches into poison cooking. Despite her lethality with poison, she is notoriously inept with firearms, and her aim with guns is comically poor. Her Poison Cooking ranks as the third most dangerous poisoning technique according to character rankings. In the future timeline, she possesses a Storm Ring and uses a box weapon called Scorpione di Tempesta, which summons scorpions that fire Storm Flames from their tails.

Bianchi's most significant relationship is with her half-brother Hayato Gokudera. Their strained relationship stems from a traumatic childhood where Bianchi would use Gokudera as a test subject for her poisonous cooking, particularly forcing him to eat her cookies before his piano recitals. This caused him to develop a psychosomatic reaction where seeing her face makes him ill or faint, which is why she wears goggles to cover part of her face around him. Their family background is complicated: Gokudera is an illegitimate child born from their father's affair with a pianist named Lavina. Due to mafia rules, Gokudera was officially declared as Bianchi's mother's child, and his biological mother died in a car accident when he was three. Gokudera initially believed his father had his mother killed, but Bianchi later reveals the truth that his mother was terminally ill and her death was accidental, showing her deep care for him as her only little brother. In the future arc, she takes on the role of a strict mentor for Gokudera, overseeing his training and pushing him to master his abilities.

Bianchi evolves significantly throughout the story from a lone assassin acting on her romantic obsession to a loyal ally and mentor figure within the Vongola family. In the future arc, she serves as an information gatherer alongside Futa and takes on a protective, sisterly role toward Kyoko, Haru, and Chrome Dokuro. She helps train these younger characters and acts as a guardian for them. Her relationship with Tsuna shifts from adversarial to supportive, and she eventually becomes a trusted member of the Vongola organization, participating in battles against major threats such as the Millefiore family.