Hey there! Sorry it took us so long to answer this - I wanted to answer it myself, since this particular topic is one I have personally put a lot of thought into due to its relevance to one of the stories I am presently in the process of writing. Unfortunately the last week ended up being pretty crazy and generally distracting, and I lost track of things. I am so sorry to have made it look as though I was neglecting you! We love our followers here at Writersfrost, and I want to apologize for taking as long as it has to get back to your question. I only hope that the answer ends up being worth the wait!When I got to working on this conundrum myself (and then prepping to use similar things in various tabletop RPGs I may or may not be running, I worked up a system of factors that I felt should be put into every evildoppelgĂ€nger character I intended to use. Itâs a set of 5 things to keep in mind that I lovingly call MIMIC, because I am a geek who enjoys making unnecessary acronyms - a GWEMUA, if you will. I hope that MIMIC works as well for you as it has for me!1) MasterUnder most circumstances, most evildoppelgĂ€nger characters are created or otherwise controlled by an outside party. Be it an evil overlord who has magically created a copy of thedoppelgĂ€ngerâs less evil counterpart (henceforth referred to as the doppelgĂ€ngee), or a mad scientist who has created a robot in the doppelgĂ€ngeeâs image - most of the time the evildoppelgĂ€nger is not doing what they are doing because of their own wishes. These masters can and should have a tremendous impact on how thedoppelgĂ€nger acts to the rest of the world. How has the masterâs relationship with the doppelgĂ€ngee affected their relationship with thedoppelgĂ€nger? Vice versa? How much power does thedoppelgĂ€nger have to make their own choices? How has the doppelgĂ€ngerâs relationship with their master affected their relationship with thedoppelgĂ€ngee? Do they hate thedoppelgĂ€ngee? Envy them? Want to destroy them to prove their superiority to the masterâs eyes? In such siturations, be sure to blend a little bit of the Masterâs traits into the evildoppelgĂ€nger. There should be some recognizable hints as to who thedoppelgĂ€nger answers/belongs to. Occasionally adoppelgĂ€nger will be an accidental thing (Tales of Earthsea comes to mind to a degree). ThesedoppelgĂ€ngers have no master - they exist on their own looking for a purpose. How does that impact their personality? Their relationships? Their goals? How did they decide what they wanted? Did someone take them in and raise them, or are they going off of the instincts provided by the cosmic accident responsible for their existence? These are just a few things to keep in mind and think about.Â
2) InceptionAlso important is figuring out HOW your evildoppelgĂ€nger came into existance as well as WHY. This isnât going to be as in depth as the above, but just be sure to keep in mind that the origin of any character is important. Are they a robot built to impersonate the leader of the precocious rebellion and destroy it from within by demoralizing the rebels through committing horrible atrocities? Is it a magically created clone intended to track down the doppelgĂ€ngee by using its superior understanding of the target? Is it an evil version of thedoppelgĂ€ngee accidentally dragged here from an alternate dimension? Think about how the doppelgĂ€ngerâs origin impacts their day to day life, their understanding of the world around them, and their opinions and relationships with the other characters. 3) MethodsWhat makes an evildoppelgĂ€nger an evildoppelgĂ€nger? What makes evil evil? There are a ton of answers to these questions that I cannot even begin to fully address in this section. However, thereâs an old saying that says that the methods make the man. How does your evildoppelgĂ€nger act? How do they react to the world around them? How do they accomplish their goals? A large part of this ties in to part 5 (read below), but a good deal is also impacted by the two aspects that we have already discussed. How do all of those factors influence the doppelgĂ€ngerâs choices? Are they violent, diplomatic, stealthy? Are they more likely to use a direct path to their goal, or are they more inclined to make complex plans to keep their true agenda hidden? 4) IntentThis one is pretty quick as well, but really sit down and ask yourself - what does your evildoppelgĂ€nger WANT? Why are they doing what they are doing? What drives them? Are they doing these things just because of evil instinct? Because of what their master has ordered? Also, an important question - at any point, do the goals of thedoppelgĂ€nger and their master split? Does thedoppelgĂ€nger have its own agenda that it is trying to accomplish in spite of what the master desires? How much control does the master actually have over thedoppelgĂ€nger, and how much understanding does each party have of that level of control? In the end, all of these are profoundly important - but almost everything that has been discussed so far can be discerned by looking at what I see as the most important guide for what your evildoppelgĂ€nger is, wants, and needs - and that, my good readers, is the long awaited final part of this talk - 5) ComparisonOne of the most important things to keep in mind about making an evildoppelgĂ€nger, in my opinion, is to make sure that there are enough paralels between thedoppelgĂ€nger and thedoppelgĂ€ngee that the connection between the two is clear to the reader based on characterization and interaction. You shouldnât just make a random villain and then declare him to be an evildoppelgĂ€nger and then just expect the audience to take it on faith. There needs to be strong lines of similarity between the two to make it a clear and powerful connection.A wonderful example of a horribly failure to do this is Praetor Shinzon, from Star Trek Nemesis. Shinzon is the evil clone of Captain Jean-Luc Picard, created by the Romulans as a weapon to be used against Starfleet. Unfortunately, there are so few recognizable similarities between the two (both are pretty bald, I guess?) that it unfortunately doesnât leave the kind of impact that needs to be made to make the character appropriately strong and memorable. It feels like with Shinzon they went so far to make him different than Picard that they lost everything that could have made Shinzon a truedoppelgĂ€nger, and instead they just got a pretty standard insane/vengeful villain. It was really disappointing to watch. When I make an evildoppelgĂ€nger of a character, either in my own writing or when making one of a PC in a game I am running, I put together a list of 5-10 distinguishing traits that the character holds (working with thedoppelgĂ€ngeeâs player when applicable). From these traits, I take about half to keep as they are and about half to reverse. This leaves enough traits of thedoppelgĂ€ngeeâs that the recognizable connection remains visible, but twisting it enough to make it clearly different in its own horrifying way. Also, donât be tempted to just write down your characterâs positive traits for reversal! Try taking some of your characterâs less heroic aspects and reversing them instead. Maybe the doppelgĂ€ngee is very boorish, loud and irritating - try making the doppelgĂ€nger polite, soft spoken, and eloquent. Lastly, donât be tempted to pick all of your  doppelgĂ€ngeeâs character traits - just take a sampling, then take the final finished product and base what hasnât already been defined about the doppelgĂ€nger and build from what you have in front of you.As an exercise, letâs take the character I am making an evildoppelgĂ€nger of in the story I am writing. Iâll list a bunch of character traits for her, and then you can make an evildoppelgĂ€nger by adding/reversing whatever traits you like - just keep it close to even! Experiment with it. Play with it. Work with it until youâve found the sort of doppelgĂ€nger that really works for you as a villain. Then try doing it with one of your own OCâs! See what happens! ~Generous~Loud~Outgoing~Fun Loving~Computer Genius~Easily Distracted~Unsubtle~Impractical~Fair~Dislikes ViolenceHope thatâs helped! Thank you so much for reading, and for your patience! And, as always, good luck!~Swordmaidenofavalon