One scene they fight someone over an insult, the next scene they wink at someone who punches out their mother. If the character is drawn well, the audience should almost be able to predict their actions and they will be similar from scene to scene, unless something serious changes their motivation. Problem 1 Trudy is a police officer who has just stumbled onto a car theft ring. In this scene she bravely goes undercover to identify the thugs. In following scenes she refuses to go near them as if she doesn't want to muss her hair.
Mirrored characters have no real depth.
She is just a surface reflection and it is only the writer's whim which makes her do this or that. But if she has a real background and is motivated, then she will be consistent. Alchemist's Solution Give characters a life which includes real motivations. If a policewoman has a family to think of, she is much less likely to take risks. In every scene, the specter of her family will hang over her and temper what she does.