Nevva Winter was the daughter of Elli Winter. She originally acted as the traveler from the territory of Quillan, but she betrayed the travelers and allied herself with Saint Dane. Saint Dane taught her to transform, control the flumes, and become immune to death. Nevva Winter helped the Security Dados of Blok find and destroy Mr. Pop, obliterating the spirit of the Revival and pushing the turning point of Quillan in the wrong direction. She also influenced the territories of Ibara and Second Earth. In the end, she betrayed Saint Dane but before she could escape, Saint Dane killed her.
Nevva Winter is describe by Bobby Pendragon to be pretty and beautiful as well by Mark Dimond. Her hair is brown, staight, parted at the side, and stops just below the ear. She wears the same atttire as the inhabitants of Quillian meaning a blue jacket with Nevva's sleeves being long as well as her pants. However Pendragon claims she is somewhat different than those of Quillan with her clothes appearing more fashion forward and the way it fitted her. Also a notable appearance is her eyes which are big, animated and brown unlike those of Quillan. Later in the series in Raven Rise her hair is pilled on top of her head "like a model" as Pendragon puts it with her clothes being a robe teasing the Ravinia colours (red and gold).
Nevva's character is somewhat complicated. She is said to be a cunniving, manipulative, and cold blooded by many especially by Mark Dimond and Bobby Pendragon which is ironic, where they both think and claim she is beautiful. However despite these negative suggestion she does have a positive side and a heart proven occasionally throughout the book. Aside from that, she is very intellectual and determined throughout her work as a Blok assistant despite it being act. It could've been her job before she met Saint Dane. Being determined and head strong, she does hold a grudge especially against her mother. Nevva Winter thought of her mother to be selfish and claims she was responsible for her father's death. This can be an explanation why Nevva Winter can be appear angsty at times and chosen the dark side to taste victory since she had to struggle. She does a bear a remarkable appearance and personality to Azula, the Fire Nation's princess of Avatar: The Last Airbender.
Nevva Winter as said before does have a good heart and can be seen showing her hinted sidings with the travelers. This can been proven in Book 8: Piligrims of Rayne in Ibara when she was disguised as Telleo and as her self. She thought and told Pendragon how she was dissapppointed that he gave up the fight against Saint Dane. However she spinkles it off by saying he was predictable, showing off her cruel personlity. Also at times she would show regret with Saint Dane. Another time where she proved she somewhat side with the travelers was when Bobby was going to murder Alexander Naymeer on the doomed helicopter. When Pendragon was about throw him off the helicopter with Saint Dane cheering him on, Nevva Winter kept on desperately shouting and begging to Bobby to don't do it or he will regret it. However she wasn't successful. At Book ten: Soldiers of Halla she later joined forces with the travelers and decides Saint Dane was using her as a weapon and his vision wasn't beneficial. She laters reconciles with her mother, Elli Winter, weeping bitterly. However when she was about to escape with Elli, Bobby, and Mark, Saint Dane kills her ending her spirit. Yet she proved she was beneficial to the travelers by saying her last words, "Black Water". That was where the refugees were held and was the only hope for the travelers and the future. Nevva Winter died a martyr and proved to be a determined, head-strong, patriotic girl/Traveler. Later throughout the book, the travelers learnt Nevva also saved Eelong as a territory "untouched" by Saint Dane's wrath before she decided she wanted to be with the travelers. It shows she had second thoughts.