Neo is seen working with Cinder after Roman's incarceration. She fights as the fake Haven team's fourth player in the Vytal Festival, and pilots the Air Bus ambulance taking Mercury Black away after his match against Yang.
Neo was an affiliate of Roman. She seemed to be the only person Roman did not regard with utter contempt and disdain, and she quickly got him out of danger on multiple occasions.
They were also shown to work fluidly together in combat, working off one another's attacks in a very organized display. This is depicted during the events of "Heroes and Monsters", where both fight against Ruby Rose and overpower her with relative ease.
On the DVD cast commentaries, series writer Miles Luna speculated that Neo would be even more dangerous if she didn't look up to Torchwick as much, and compared the dynamic to that of Harley Quinn and the Joker from Batman. Lindsay Jones also compares their relationship to that of a daughter and father, with Miles agreeing.
She is also the only character towards whom Roman has exhibited any genuine concern, as he cried out in horror when Ruby activated her umbrella atop an airship during the Fall of Beacon, sending her flying.
In "The Coming Storm", it is revealed that Neo has not gotten over Roman's death and she wears his hat in remembrance of him. She attempts to exact vengeance on his behalf by trying to kill Cinder, whom convinces her to instead target Ruby, citing she was the true reason why Roman was killed.
Neo is part of Cinder's team during the Vytal Festival Tournament. Whilst they have not been shown interacting much, she apparently works well with her as a team in combat.
Neo's affiliations with Cinder's faction continued even while Roman was imprisoned by the Atlas military.
In "The Coming Storm", Neo wants revenge on Cinder who she believes is responsible for Roman's death. After Cinder reveals her Maiden powers, Neo agrees to work for her to kill Ruby. They later seal the deal with a handshake in "The Grimm Reaper". In "Our Way", Neo impresses Cinder when she demonstrates her Semblance on a Mistralian airship.
Neo has displayed exasperation when dealing with Cinder, usually rolling her eyes and taking her time while giving Cinder a response. Furthermore, while Neo was visibly happy when working with Roman, she is shown to be often annoyed and somewhat resistant to Cinder.
Cinder has been able to take advantage of Neo's anger to manipulate her, using the girl as a tool to regain favor with Salem by promising her vengeance on Ruby. During "Out in the Open" when Neo attempted to rebel against her orders, Cinder was able to get her under control by assuring her she would get to kill Ruby after they finished her mission.
Neo and Ruby first see each other in "Painting the Town..." when Neo rescues Roman with her Semblance.
Later, when she discovers Ruby on their stolen airship, she sends Roman a message with Ruby's picture and the text "Guess who?"
When the two fight, Roman later joining in, Neo is easily able to disarm and overpower Ruby. When it looks as though Neo is readying to kill her, Ruby saves herself by pressing Neo's umbrella open and sending her off the airship via the high winds.
In "The Coming Storm", Neo is convinced by Cinder that Ruby is the one responsible for Roman's death, prompting her to team up with the Fall Maiden to hunt down and kill the Huntress.
Neo infiltrated Atlas with Cinder in order to have her revenge on Ruby. She aided Cinder by spying on everyone during "Cordially Invited", and smirked as she watched Teams RWBY and JNR go off to fight the Grimm in "As Above, so Below". Later that night, Cinder ordered Neo to take the Relic of Knowledge from Oscar, however Neo immediately became upset and took on Ruby's appearance to illustrate her wish to prioritize her revenge.
Although the two have only interacted in battle, Neo seemingly enjoyed fighting Yang, even to the extent of toying with her in the midst of combat. Yang's temper came out in reaction to this and Neo used it to her advantage. After the battle ended, Neo gave a sadistic smile as she prepared to kill Yang.
In "No Brakes", Neo immediately became fearful and retreated from the train car after Raven arrived via a portal to stop her from killing Yang. In the Volume 2 Director's Commentary, it is stated that she retreats because she can tell that Raven is someone she cannot defeat. This is evidenced by her opponent's superior speed and Omen, her telescopic blade.
Neo was tasked by Cinder to locate the Relic of Knowledge, which she found was in Oscar's possession, though she seems to have no personal feelings towards Oscar. When Cinder charged Neo with taking the Relic of Knowledge from Oscar, she rebelled, apparently seeing the task as less important than her revenge. However, after being assured she would get to kill Ruby, Neo relented and went after Oscar.