Summery
Calamity is a powerful Demon from the 1st circle of Hell Avernus. Calamity is otherwise a light-hearted bubbly curiosity driven women with a knack for holding deep grunges, Calamity longs to see what’s beyond the plains of suffering she calls home.
a Dialias can only leave their circle of Hell if they gain great power, making a pact with a primal demon is the way Dialias do this.
Calamity's family was torn from her and she was left orphaned and scared from the Lord's judgement there was one though who didn't judge her as the other demons did
Calamity forged a pact with a truly terrifying Primal Demon named Vicaltreon who Calamity managed to somehow make friends with during her time, a terrifying dragon like Demon that ruled over the entirety of the nine hells before the circles were split between the current lords towards perhaps the beginning of time.
With their combined power they managed to break free into the mortal realm. Vicatrlon urge to destroy was quenched long ago and now shares Calamity's wish to explore. Vicaltreon can easily conceal himself as a mortal man with similar features to a Tifling named Vincent.

This Event caused a massive temporary gap to open between the Mortal realm and the 9 Hells and caused a great cataclysmic event where a massive surge of demons flooded into the mortal realm.

Personality

Appearance
Calamity Appears as a large upright dragon like demon. She has a long neck with a very hourglass shaped torso, extremely long arms and legs, clawed hound like feet and extended clawed fingers.
Brored shouldered with a large bust and 4 arms, to from her shoulders and two from where a person's shoulder blades would be.
Her body is covered in eyes, one on each of her fore arms and thighs, 6 eyes on her face, two on each side of her neck and a large one on her back
She has bright red hair running like a horse mane from her head and down her neck, lowering to just before her hips.
she has two antenna like horns on her head that curve back all the way down to her knees and three long featureless tails.
she has a bright red gooey chest that extends to the inside of her thighs and tails otherwise is a deep dark complexion

Calamity's appearance is quite noticeable and overall hard to describe.
Much like Yizamat She has a more humanoid form she takes for the sake of limiting altercations.