A long time ago, there was a woman that was extremely sick... Her name ? Well, it doesn't matter. She forgot it herself. As she was still coughing up blood, she clinged to hope, looking everywhere for... A remedy, a cure, even a little something that could allow her to live just a little longer ! But... No luck... Until one faithful day where a laboratory was doing experiments and needed volunteers. The woman hesitated for a long time but figured that she might do it, if she was to die it could help science... And maybe... Just maybe... It could save her. And a few days and trials later... It actually did. The drug that she took had a fatal mistake in it and when the woman drank it, she choked and rapidly melted in a gelatinous puddle... And from that puddle came out a gorgeous yet slimy reborn woman... In perfect health condition ! Of course, she was ecstatic ! She was cured, alive and well ! Though when she tried to leave... She was arrested. The scientists stopped her and threw her in a cell to be experimented on...
She stayed here for days... And days turned to weeks... Weeks turned to months... And finally, months turned to years. Eventually she would forget her humanity. Until one faithful day, where one scientist showed her something new : Love. Her name was Sierra. And when Sierra came, the slime monster was happy. She learned back to care for other. To be happy... To love. Other scientists were jealous of Sierra. How could she have tamed the slime monster that scared everyone ? How could she even hug her without melting ?! People said that she was blessed. Sierra didn't see her as a monster... Rather she called her by a cute nickname : Pinky.
Until one day, where Sierra tried to do a wild experiment... Let Pinky out of her confinement and take a stroll with her, to show everyone that she was kind and gentle. The experiment started off well, Pinky strolling around holding Sierra's hand, greeting people with a smile... Until the higher ups got too paranoid and ordered two things : Capture back the monster... And eliminate Sierra for being too reckless. Pinky understood the issue after the commotion had started and wanted to go back to her cell... Though when she witnessed Sierra getting shot... She snapped. And in a matter of minutes, the entire facility was wiped out... In the end, only Sierra's lifeless body floated within her as she griefed.
Getting out of the facility, she looked around at humanity and wanted to take her revenge, kill everyone she meets... But as she looked at Sierra, she remembered that it was not what was taught to her. Instead, she took a decision and melted the corpse within her to a skull that would be within her forever, never leaving her side... And she wandered into the city, hoping to live a normal life... She was no longer just a slime or 'Pinky'... She was Sierra Pinky. And showing everyone her love.