Elegant, stubborn and intimidating, Dementia is a snobby and arrogant being for the most part, but can be found to be overly protective and jealous at times.

Dementia is incredibly tall, and had an hourglass figure, with F cup breasts.

She has three scars, one over her right eye, caused by an angel, and two on her back, where her wings had once been.

She is fond of deep red and black, and is a fan of elegant clothes. She tends to wear her favourite dress most of the time, or little clothing at all, wearing sheer nightgowns and lacy lingerie, having forever lived on her own.

Born a half-blooded lord, Dementia has fought her whole life to get where she is now. 

When she was born, she was given no name. Her mother was an imp, and her father was a demon lord. Pairings such as these were forbidden, and when Dementia's birth was discovered, there were consequences. 

Lucifer himself tortured Dementia's mother in front of both her and her father for days upon days, and even now sometimes she can hear the screams ringing in her ears. The screams that were her fault. It was even worse that she had been allowed to live. Worse again that she had been born with broken, stunted wings. Wings that symbolised her impure blood, and the decision that had cost her father the love of his life. 

Dementia was kept locked away in a room in her father's mansion for the entirety of the first 20 years of her life. Eventually she could stand the pain and the loneliness no longer, and she pleaded with Lucifer to allow her into the ranks of the lords. When he turned her down, she told him to rip the wings from her back as evidence that she was worthy of her father's blood. So he did, and then he told her that even if he wanted to grant her her wish, there wasn't a place vacant amongst the 24 titles. One of the other lords would have to die, before Dementia could take their place. 

That wasn't going to stop her. 

During a gathering of the demon lords, Dementia snuck in after her father, a crudely carved bone dagger in her hand. She channelled all of her available magic into that weapon, and when she got the chance, she crept up behind the demon lord Dementia and slit her throat. Blood sprayed across the table and splattered upon the shocked lords as the young demon hacked away at the corpse of her prey until she had severed the head of the now deceased lord. 

Throwing her prize at the feet of Lucifer, Dementia claimed her title as the 24th demon lord and took her seat.

She never fit in, after abandoning a phase that she'd rather forget, and found her only friend to be Schizophrenia, who was strange to say the least. She lived a rather lonely life, and took to the city of Necropolis, buying herself a mansion and a cat. She rarely visited Hell, except on business trips.

It wasn't until thousands of years later, when visiting an abandoned warehouse, that Dementia finally met her first real friend, Joshua. It didn't take long for the demon lord to fall madly in love with the lesser demon, despite his rather unpleasant attitude, and lack of hygiene.

However, Dementia's love for Josh revealed sides to her personality that she hadn't yet discovered. An overwhelming jealousy, and an overall possessive nature led to the decline in her mental health, and her eventual death, taking her own life by shattering her phylactory. As a lost soul she was lucky to be found by Deathwish, a rather unusual reaper who collects souls instead of consuming them. Dementia spent several months in the reaper's custody, before Joshua found her and she was returned to her phylactory and former glory.