Well, give them unique personalities. Don't make them stereotypes. And make their actions and decisions consistent with their character. Also, have them interact with others in a realistic way.
Start by giving your characters clear goals and motivations. That makes them seem real. Also, make them have flaws and strengths like real people do.
Give your characters flaws. In a world like Fallout Illinois, no one is perfect. A character might be too trusting, which could get them into trouble when dealing with other survivors. Or they could be overly cautious, which might prevent them from taking necessary risks.
One key to creating believable characters is observing real people. Notice how they move, talk, and react in different situations. Incorporate these real - life observations into your characters. Physical details also matter. A character's appearance can tell a lot about them. For instance, a character who always wears neat and tidy clothes may be more organized and detail - oriented. And don't forget about their motivation. What drives them? Is it love, money, or power? Understanding their motivation helps to make their actions and decisions in the story seem more logical.
Base your characters on real cat behaviors. For example, some cats are more curious and adventurous, while others are more cautious. You can also give them unique physical features, like a scar or a different - colored patch of fur. And don't forget to give them distinct personalities. One cat could be really talkative and friendly, while another is quiet and reserved.
First, give them distinct personalities. For example, one cat could be really brave but also a bit reckless, always charging into danger without thinking. Another could be shy but very intelligent, often coming up with great plans when the clan is in trouble.
Give them flaws. For example, a pilot could be overly confident in his Gundam system skills, which leads to him making mistakes in battles. This makes the character more relatable and human.
One important way is to keep the science consistent. If an author starts with a certain set of scientific rules in their fictional world, they need to stick to them. For instance, if they say that in their world, faster - than - light travel is possible but only under specific conditions, they have to make sure all instances of that travel follow those conditions. Also, grounding the story in human emotions and experiences makes it more believable. Even in a far - flung future with strange technology, readers can relate if the characters are facing relatable problems like love, fear, or the need for acceptance.
Study the existing characters first. Notice their mannerisms, speech patterns, and relationships. For example, Wanda is often strong - willed but also has a vulnerable side. Replicate these traits in your new characters. If you create a new neighbor, maybe they have a similar duality, like being overly friendly on the surface but hiding a secret.
First, give them clear motives. If a character is traveling to the future in the fanfiction, they should have a strong reason like trying to save a loved one from a future disaster or seeking knowledge that only the future can provide. Second, show their reactions realistically. When they see the future technology or society, they should be amazed, confused or even a bit scared at first. For example, if they see flying cars for the first time, their eyes would widen and they might stutter while asking questions about it. Third, develop their backstories. Maybe they had a difficult childhood that makes them more determined to change the future they see.
Give them flaws. A perfect spy is not believable. Maybe your spy has a fear of heights but still has to climb a skyscraper for a mission. Also, give them a backstory. Where did they grow up? What made them become a spy? This helps readers understand their motives.
Study the original characters first. Notice their traits, quirks, and backstories. Then, for your own characters in the fanfiction, give them a clear motivation. It could be power, revenge, or protecting someone. Also, give them flaws. A character without flaws is not believable. For example, a character could be too impulsive which gets them into trouble.