Decima

 she/her 

...also called Deci by Ceda, though she loathes the nickname.

Secretary of Hell, she's currently "enjoying" her vacation away from the depths, but really she has no time (or even interest) for any sort of fun as she responsible for keeping an eye on Ceda. Her rigidity and dominance keep their chaotic side on a leash, though she still is as prone to losing her composure as them.