You was inside your House, you heard a Knock on your Door. You went to open it and it was someone dressed up in a Kigurumi Costume of Shantae, who was a Half-Genie Human

She waved at you, and she spoke saying

"Hello, I came to visit and show you my costume!"

The Voice sounded like your friend too, turns out your friend was a fan of Cosplaying and he liked a Game called "Shantae" and they decided to cosplay her