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Jojo Stardust 2

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Demencia is a villainess of the 2017 series Villainous. She is the crazy assistant of Black Hat, who constantly tries to get her boss to like her, to no avail.

She was voiced by Meli G in the original Spanish dub and by Melaney Sems in the English dub.




Demencia has a navy blue vest with a hood that has a reptilian animal on it, presumably a dragon, with her large ponytail coming out of it. She has pink and lime green hair and one eye with a yellow iris. She has blue and red mismatched shoes and leggings, with a metal cuff on one of her ankles.


Demencia is as a energetic, hysterical, mischievous, craving for destruction and troublemaker girl. She also seem to be madly in love with Black Hat, as shown further in "The Perception of Evil" when Demencia created a muscular version of him and lovingly clings to him. Despite this, as shown in "Foul Flower" and "Black Hat Organization Q&A", the thought of Black Hat being a hero is very upsetting to her. Demencia is shown to be scatterbrained, as she tends to go through things without any thought or thinking.





  • In "The Note of Destruction", she is shown to play the electric guitar well.
  • She is likely named after the mental illness of the same name, demencia, known in English as dementia.
  • In the background of one of the shorts, a blueprint for what appears to be Demencia appears, suggesting she was created by Dr. Flug and/or Black Hat.
  • Another theory suggests that in the past; Demencia was a normal girl with a kind and polite personality, who at some point, she was kidnapped by Black Hat and experienced by Flug, making her what she is now.
  • Demencia might be based on the concept of the character Harley Quinn.