Result: Hypnotize her
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You look around for a moment, and see a pretty little flower blooming nearby. You pluck it from the ground and hold it up between you and Nikki.
"Look at this."
"Okay," Nikki says. She's almost sitting on the ground shoulder to shoulder with you.
"See how nicely the petals flow out from the center," you say, slowly spinning the flower with your fingers.
"Yes," Nikki says, following the motion of the petals with her eyes.
"It's a nice day, and we're alone out here. There's nothing to bother us, and more importantly, nothing to bother you. All that you need to think about is me and this flower. Let everything else go, and let yourself see only the flower."
You wave the flower back and forth a little, watching Nikki's eyes track it dutifully.
"Feel yourself relax as you let everything except the flower fade from your mind. Let your thoughts grow quiet, and feel the tranquility as you empty your mind."
Nikki lets out a little sigh. You can tell she's following your instructions well.
"Nothing else matters. Focus on the flower. Listen to my voice. Watch the petals. Watch them spin. Watch them go around and around. Around and around. Around and around. All that matters is this flower. All that you can see is this flower. All that you can hear is my voice. This is your whole world."
"Ahh," Nikki sighs, mesmerized. You peek into her head. In her mind's eye, the flower really is all she can see. Even the fingers holding the stem aren't there. You smile at her and keep talking.
"Feel your mind spin with the flower. Feel it spin, spin spin, until you can't tell which way is up. You don't need to know that. All you need to know is that this flower is here, and that my voice is here."
Nikki sways a little as you say that, your words having the desired effect.
"Now, in a moment, I want you to touch this flower. When you do, you will feel your mind flow into it. You'll see it and understand that this flower is your mind."
"Yes," Nikki says. You hold the flower in front of her.
"Touch it."
Nikki obeys, and you see her shiver a little as her ghostly finger brushes against one of the petals. You pull the flower back and begin spinning it again.
"Look at how pretty your mind is, Nikki. It's so beautiful. You could look at it forever."
"Yes," Nikki says.
"But, even though it's so pretty, you don't need it. A girl like you doesn't need her mind. It's pretty, and nice, but it's so very distracting. Having two things in your word is so distracting. You don't need both, and your mind is so easy to let go of."
You grab one of the petals with your other hand.
"Here, Nikki, I'll help you," you say, as you pull the petal from the flower and let it flutter to the ground.
Nikki gasps a little, then relaxes again.
"I bet letting go of a piece of your mind felt good. You didn't need it. It was distracting you from my voice. All you need is my voice."
You pull another petal and let it fall, triggering another gasp from Nikki. Her eyes remain fixed on the flower, never wavering to look at the falling petals.
"When the last petal drops, you'll be free. All you'll have to know is my voice. It'll be so much easier, so much better. You'll be so happy."
Nikki's hand reaches toward the flower. You can see in her mind that she wants to pull the petals herself. It's too bad she won't be able to touch it. You'd let her.
"You're such a good girl. Let's speed this up a little then," you tell her, pulling three petals out at once. She lets out a gasp of pleasure, eyes widening.
"Six, five, four, three...two..." you count as you pull most of the remaining petals out. Nikki is staring fixedly at the last petal. You can tell without even reading her mind that she's nearly gone.
"One," you say, gently tearing the last petal from the flower. Nikki's breath catches, and her eyes lose focus. She's yours. Not a shred of resistance remains in her mind.
She'd make for quite a useful slave if you were to make her think that way. You look at the cute, hypnotized ghost girl quietly staring at nothing. Yeah, you want her.
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How do you want to change her?
1: Make her your unassuming slave, totally unaware of what happened, but utterly loyal and willing to do anything for you.
2: Give her an alternate personality that exists solely to serve you.
3: Just make her your slave outright.
4. Other