| Alias | Nullwarden |
| Planet origin | |
| Current Age | 70-120 |
| Gender | Female |
| Species | Human |
| Classification | Offensive Psyker |
| Level | >100 |
| Class | |
| Faction | UHF |
| Ship/Squad | Sovereign |
| Chapter introduced | Arc 0, Chapter 3 |
Major Zephyr Quinn is the Proprietor of the Kuigon Sector, the former apprentice of Anrake Vedun, and commander of the Recruitment Drive of 943 in the Kuigon Sector.
She is a psyker and extremely powerful for her rank. Despite her tier-4 rank of Major, she is likely tier-5 or higher in power as a Colonel states that she is both more powerful than him and could gain a higher rank (i.e. T6+) than he has if she wanted it.
Mentored by Anrake Vedun while a recruit.
While her age is unknown, she was a recruit over 50 years ago, which puts her minimum age around 70. Similarly, she's likely less than 120 as Anrake would have likely said more than 100 years in that case.