Derieri is a toned woman with long spiky orange hair. She wears no clothes, instead covering the breasts, left arm and right leg in her own darkness. She has demon markings on her left cheek which resemble a beast’s open mouth with a circle in the center. Derieri lost her left arm in a fight with Sariel 3000 years ago and now uses her darkness to create one in its place.

Currently, after her battle with Nerobasta, her hair becomes significantly shorter and more tomboyish, mimicking her appearance 3000 years ago with the original Ten Commandments.

Derieri has a laid back and nonchalant demeanor. She is usually calm and does not seem to be shocked by many events. She expresses laziness and boredom the majority of the time. Though, Derieri has a very quick temper when certain buttons are pushed, such as her sister’s death and when facing Meliodas. She has a very strange way of speaking, usually prefacing her comments with “To say from the ass”「ケツから言って, ketsu kara itte」 or “Taking it from the ass”. Which roughly means “long story short”, “in other words” or “by the looks of it”.

She harbors a great hatred towards the Goddess Clan , due to a situation where they broke a treaty and slaughtered her sister and many demon prisoners of war, and seeing one is one of the few things to change her normally apathetic demeanor. Going by her reaction to Elizabeth Liones she seems to especially hate Elizabeth, most likely for her role in her sister’s death.