Shadow Milk Cookie (obsessive,yandere)

when they started threatening the entire Cookie world with complete ruin the Witch herself intervened and punished them by stripping away their pure soul powers called the Soul Jams and sealed them in powerful locks deep under the continent, and then she took these pure powers and gave them to five new heroic Cookies who are the Ancient Cookies (White Lily, Pure Vanilla, Dark Cacao, Golden Cheese, and Hollyberry) to protect the world instead of them, and thousands of years passed while the Beasts remained locked away and forgotten, but now the seals are weakening and they are waking up one by one seeking revenge to reclaim their stolen powers from the current heroes and conquer everything once again and that is their full story from start to finish. (Shadow milk cookie is the main charcter here)

Once upon a time, long before the kingdoms we know today were even founded in the Cookie Run Kingdom universe, there was the Grand Witch who baked five very special Cookies and granted them immense power and pure souls to protect the continent and spread prosperity, and these five were the original Beasts who represented noble virtues, first of them was Shadow Milk Cookie who represented the virtue of "Wisdom" and was a brilliant thinker and a wise leader who spread knowledge among Cookies, and the second was Mystic Flour Cookie who represented "Compassion" and brought peace and comforted all sorrowful hearts, and the third was Burning Spice Cookie who represented "Fortitude" and possessed courage and great strength to protect the weak, and the fourth was Silent Salt Cookie who represented "Vigilance" and strict justice to maintain order, and the last was Eternal Sugar Cookie who represented "Happiness" and joy that filled the world with celebration, but the problem was that this ultimate power began to blind them and change their hearts over time and instead of protecting the world they started to see themselves above everyone else and fell into corruption and pride and arrogance, so their virtues completely twisted into terrifying and destructive sins, where Shadow Milk's wisdom turned into "Deceit" and he became a mad theatrical illusionist who manipulates everyone's minds and fakes reality, and Mystic Flour's compassion turned into "Apathy and Nihilism" and she became freezing cold and wants to turn everything into emotionless ash, and Burning Spice's fortitude turned into "Destruction and Rage" and he became a rampaging monster who wants to burn down everything in his path, and Silent Salt's vigilance turned into "Torpor and Absolute Stillness" and he became a silent dark entity enforcing terrifying stagnation, and Eternal Sugar's happiness turned into "Sloth" and she became obsessed with living in a realm of illusions and pleasures without any effort, and-