Braggart. one who makes overblown claims or empty boasts.
Hypocrite
One expression describing a person who pretends to be morally better than he really is is "a whited sepulchre".
A person who pretends to be better than they really are can be described as a "hypocrite" or "phony." This individual may project an image of moral superiority or success that is not authentic or truthful.
An "impostor" is someone who pretends to be someone else, or who pretends to have status or credentials that he lacks.
Pretends to be ill is when a person is acting as if he/she is ill but actually the person is not ill.
imposter
Innocent
An individual who pretends to be knowledgeable in order to deceive is known as a charlatan. One who pretends to be knowledgeable or clever in general can be called a wiseacre.
pretentious person
I would go with phony, hypocrite, pharisee, liar, or poser.
They would be a hypocrite.
The choose your own adventure series of books can be written in any viewpoint, first, second, or third. First person pretends that you are the main character in the story. Second person pretends that you are Third person pretends that you are god, and have control over the characters in the story.
A person who pretends a great deal about everything is often referred to as a "fabricator" or a "fraud." They may also be called a "deceiver" or a "charlatan."