This was inspired by another thread. One of ya'll guys was wasking about changing their hero into a more arrogant character. I was thinking about responding in the thread, but as I typed, I realized that my response was a little bit too complicated for that single thread. Also, I figured others might be able to pick apart what I say and give some crucial feedback and suggestions, as well. So why not make this a kind of lección sobre Personality change? Anyway, the main question that we are considering is that we have a character with a well developed personality already. Personality type A, and we want to change that personality into a much differently developed personality type: Personality type B. There are several things to note about this: If you simply start having the character act like they possess B type traits, something will seem off, and the reader will react as if the story was a piece of bad writing. An example might be: (a very short example, sadly) Malcome slowly took a draft of one long cigarrilo after another. He held in the smoke as long as he could, relishing the burn inside his lungs. When at last he let the white stuff stream out, a crooked smile curled on his lips. "hey, wow, what a great day! I hope this is the best day whatsoever!" and then he jumped up on the sofa and did the hokey pokey. But the flick flew out of his hands and he coulsn't control himself and started flipping the buttons all over the place on the remote control, and then he died. Is something wrong with the previous paragraph? Yes, the character went from a slow, mellow convalescent to a hyperactive immature klutz in the span of 4 seconds, with apparently no reason for it. Now, this is a little drastic. I don't expect any of you guys would write like this. You are probably better than that. But I think it gets my point across at least. So, how to start changing character traits without making it seem like the above? Well, the easiest way, and also the most realistic( because this is how people change in real life), is to have your character discover that a modification of his behavior solves a recurring problem. Right off the top of my head, I can imagine that a deeply mellow person might find that a mild display of annoyance might solve a small problem with another character. That's a positive feedback. Immediately, your character is likely to repeat that display of mild annoyance should the problem arise again. And over time, if problems arise that reward displays of annoyance/arrogance over mellowness/calmness, then that character will display a marked tendency to start leaning towards more of those types of reactions. The trick, however, is to gradually accumulate the character responses over time. As arrogance, or perhaps any other character trait becomes more desirable as a way for the character to solve his or her problems, the more the character will switch over to the new personality. And since this is realistic in real life, too, the reader will not have too much of a hard time digesting it. However, there comes a warning. There will and should be friction between the character and the reader. No reader will simply accept that their beloved character is changing wholesale. No character will completely embrace the new methods of doing things. This is where inner conflict comes into play. Neurosis. Struggle. Strange behavior. You have to make things appropriate, because if the character throws himself with whole abandon into his new personality, the reader is going to feel tormented. If the character struggles too much with his new personality, the Reader is going to get impatient with him/her and get annoyed themselves. You, as the writer, have to find the appropriate balance. This comes with experience, and knowledge. Try it out. Don't be afraid to experiment. I hope this helps, and anyone who wishes to add any information, go on ahead. Thanks a lot for listening, John Horace, out.