First Mentioned: Hvs.tCF 112
First Appearance: Hvs.tCF 120
Delta is a level 9Erf-b3-p277 Fox Forcer and one of Charlie's highest ranking archons. She appears to be responsible for coordinating Charlescomm's operations, feeding intel and instructions to other archons and hired barbarian casters.
According to Bunny, she simultaneously hates her job and takes great pride in it.
Real World References
Delta's logo is based on the Delta Airlines logo from 1934-1951. It's possible that her appearance is based on a woman from that time period.
Many Archons are references to older (often Charlie's-Angels-era) television actresses or characters. Delta looks like, and may be a reference to, Delta Burke of Designing Women.