Answer:
The negative hero in each story
A person who chews the ends of their fingers
I'm a small ring shaped fried cake, often with bavarian cream or fruit filling, and sometimes covered in icing and sprinkles.
What is this Mexican dish consisting of a tortilla rolled around a filling, typically of beans or ground or shredded beef?
Spies and detectives do this to phones and musical shoes make this sound.
This food is a tortilla filled with cheese and sometimes chicken before being heated or cooked.