Backstory:

Pandora one of the human girls that existed as something awfully evil, something beyond evil itself, so evil that it was known for being the presence of one piece, one fabric of Anti-Chara as she was created by Anti-Chara inside of Anti-Tale but was sent throughout the entire of the Corrupted Multiverse itself to be sent inside of the Dusttale Prime Universe. As her one goal was that humans and monsters never should exist in the first place as she has deep hatred against the Undertale Prime Universe and many other Au's that exist as she was the root of Multiversal Evil itself as she would be an insane, crazy, sociopath, manic, genocidal, homicidal and many more. As the words to describe her would go on forever as she is stated that she was just an malevolent being that existed for 1,000,000+ years making her an immortal being as her existence isn't important but yet something to be feared entirely. She would often travel on space itself in some random Au's that isn't that important and would head towards the surface world first or known as Earth and would travel there as she would head down into the mortal dimension aka Earth inside of an random alternate universe as she would begin to do an genocidal spree killing mortals aka humans everywhere and anywhere she went while smiling having an smile of the devil itself. As with one slash she ended the entire mortal dimension entirely killing everyone in site but one thing isn't for sure... Why Dusttale Prime Universe? Well, it was stated that she was too insane and to crazy to exist inside of the Main Multiverse. As she would be sent to this AU instead even through her birthplace is known as Anti-Tale as she was said to be Anti-God's favorite girl as she didn't had determination but the source of something much more darker, much more evil as it was the source of essence of Anti-Chara in which, she is said to be "The Devil's Favorite Girl". Pandora is known for being an evil and demonic type creature that is said to be the root of all evil and is the embodiment of all genocidal beings across the Main Multiverse itself as she is stated to wipe out universes in mere seconds as her power was stated to be almost equal to an Goddess but she manipulates her power just for fun as she is seen to destroy useless and random nonsense alternate universes as her title was an "Destroyer" in which, is evil not enough? She has no LV in which, it's undefined as some say that her LV keeps going higher and higher but her HP can be hacked through and say it's 1,000,000+ with the HP of 100,000,000+ which means = 100 Million HP entirely which made her the ultimate user of Absolute Determination as she can hop through her home AU and here as well as her goal here is to stay here and wait till it's time to kill Chara then vanish even though she might cause chaos herself.