Neon is the daughter of the boss of the Nostrade family, who are part of the Mafia. She is a hyper but spoiled young girl, who enjoys collecting body parts (whether they are legal or not) as her hobby. She is constantly protected by many bodyguards by the order of her father.
Neon possesses a prophetic ability, which she calls "Lovely Ghost Writer". While she herself does not realize this, it is a form of specialization nen. Her prophecies are 100% accurate and written in the form of a poem. Neon cannot predict her own future, and is able to write a prophecy using only a small amount of information from her client. The prophecy is a automatic process, so what is written on the paper must be asked by the person in question. Neon's father was able to rise up in rank in the Mafia because of her ability. This made her father more interested in her ability then her life. This also made her father overly protected over her, assigning her many bodyguards. Kurapika is one of Neon's bodyguards.
Later in the story, Chrollo Lucilfer steals her ability, causing the Nostrade Family going downhill.