Braggart. one who makes overblown claims or empty boasts.
Hypocrite
Yyy7
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.
A person who pretends to be what they are not is typically referred to as an impostor or a fraud.
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.
Fake