Neopolitan/Affiliation

Roman Torchwick
Neopolitan is an affiliate of Roman. She seems to hold no problems with him, and quickly gets him and herself out of danger upon his command, which implies she's heavily loyal.

Monty Oum has said she was designed due to the need for Roman to have a right-hand woman.

Cinder Fall
As Neopolitan is an affiliate of Roman, it can be presumed at the very least that Neo knows about Cinder. However, whether their relationship is forced or not has yet to be seen.

Mysterious Swordswoman
As seen in No Brakes, Neo seems to immediately recognize the mysterious swordswoman, becoming fearful and immediately retreating from the fight against Yang Xiao Long.

Yang Xiao Long
Although the two seem to have only interacted in battle, Neo seems to enjoy fighting her, much to the fact of even toying her, but it is unknown if she has anything against her, since she willingly wanted to kill her but was unable to.