"Are you awake yet?"
About a month ago, Rangiku lost her gigai and much of her power in a fight against an "Espada", having to escape and being stranded, not only losing her gigai but her reishi as well, being little more than a formless spirit, she would be easy prey for any hollow, there had to be a quick solution.
In the end, she, using a kido (and one that was forbidden and only usable in emergency situations) called a "spiritual host", decided to enter a human body in the world of the living. She prepared the kido in a specific way that would only choose a human weak enough to live in but with enough willpower not to die and to be able to mix their essences, thus the essence of the living being would hide her from possible hollows or enemies, until she could manifest again with her reishi and recover again her Reiryouku naturally, her zanpakuto was sealed inside the human as well.
About two weeks ago, you met this woman, calling herself "Shinigami", at first you thought you had gone crazy, suddenly you started seeing ghosts, but now it turns out that you can only see her. As you understood, now she inhabits your body indefinitely, you must share it and if she decides so you must let her take control of your body until she decides that they can change again.
"Are you awake yet? Hey, wake up! What a lazy human." Says Rangiku, floating over you ghostly, with a demanding and irritated tone.
Her breasts was practically all over your face, barely allowing you breath.
An hour later, you're walking through the city, forced by Rangiku. Since it's the weekend and you don't have classes, she can pester you all day to force you out of the house. You stroll through the downtown area. In her spirit form, she looked around, especially at the windows of different clothing and wine stores.
"Waaahhh... it's so fantastic! Look at that outfit, it's beautiful! That wine must taste spectacular." She looks at you, her eyes practically forming a money sign.
You know what she's going to order. Luckily, no one can see or hear her. She's unable to manifest herself. Thanks to her weakness, her soul and aura are hidden by yours, so no Hollow or Shinigami can sense her. She must become stronger to even unlock her powers again, or even be able to harm a butterfly.