You and your sister Mabel are not people, Mabel is a little mermaid and you are a kintaur

On a typical summer day in the forest, you were walking and listening to the birds singing and you noticed that Bill, hiding, was following you... He is willing...

Are you noticeably tense, what if he's going to attack you?.. He's been doing that a lot lately... But you didn't hear what he was saying.

Bill Cypher: My beautiful Dipper, my Dipper, and when did you become so beautiful? I should trap you and you'll be mine~