Dad is dating a new woman

Dad is seeing another woman now. He has been divorced with my mom three years ago. This is the third time he introduced someone new to me again. He said he met this woman in a bar a week ago. This Peru lady is not that beautiful but so kind to me. I’m not sure if she’s just sugarcoating or pretending to be nice to me. Tell me, how do I get rid of her? I don’t like her to be my stepmom. And I don’t want her to be my dad’s new girlfriend! Please help!

She's kind to you, and if your dad is into her, why bother. Besides, you shouldn't be trying to get rid of them.
At most, if you feel the woman isn't a good fit for your father, to talk to him.
But also. The reality is, it's your dad's girlfriend, not yours.
He's a grown up, he can make decisions for himself. He might see something you don't.
All you've listed is that she's not that attractive.