A slaughterhouse!
Of course, she wouldn't know it was a slaughterhouse at first. But as soon as we arrive, I would lift her up by the throat and drop her legs first into a meat grinder. I would watch her be slowly turned into minced up sharkmeat as she stares at me, her body going into shock. Her eyes full of pleading and pain and betrayal. As the grinder obliterates her beautiful legs and reaches her torso, her eyes would begin to glaze over as her body starts shutting down. While she's still aware, I would take a sharp knife, grab her by her beautiful blue hair and cleanly behead her. The skull has far too much bone in it, after all.
As the lack of oxygen forces her sweet face to make a retarded, slack-jawed expression, I would kick the rest of her body down into the steel jaws of the grinder, to be finished off. As her eyes frantically dart from her body to me, I would kiss the top of her head with genuine affection, whispering to her that everything would be okay and that she would live on with me forever.
Seeing that my beautiful oshi had a dignified death, next to a loved one, I would of course take a set of plastic bags and I would collect the delectable meat. I would hurry home to place it into my freezer - such precious haul going to waste would be a disaster.
Over the next few months, I would slowly consume Gura, bones and all (after all, they are soft and more like cartilage). I would invite guests over and make the most delicious meals out of her, and people would praise them to high heaven.
I would then go back to the closet in which I stored her handbag which I had taken from her before turning her into meat, and I would find the little paper note which had the log-in details for her account. I would log in, fire up a voice changer, and begin streaming. People would know that something is wrong, countless rrats would start - has Gura been replaced? But only those of you who read this thread would know the full truth.
I love you, Gura.