Give them flaws. In war, no one is perfect. A character could be overly confident which leads to mistakes, or be too scared which affects their performance. Their flaws can drive the story and make them more relatable. For instance, a soldier who freezes in the heat of battle because of a childhood trauma. You can also show their growth throughout the story as they face the harsh realities of war.
Give your characters clear motives. In the aftermath of a civil war, a character might be motivated by revenge, or by the desire to rebuild their family's lost fortune. By having a well - defined motive, the character becomes more believable. Also, let them have flaws. No one is perfect, and in a post - civil - war setting, flaws can be magnified. Maybe a character is too trusting or too quick to anger, and these flaws can lead to interesting plot developments.
Believable characters in this fanfiction can be created by making them react realistically to the events of the Infinity War. If they see destruction and death, they should show emotions like shock, grief, or anger. Also, their powers should have limitations. No one should be all - powerful without some sort of drawback. For instance, a character with super strength might get tired quickly if they overexert themselves. This makes them more human - like and believable in the extreme situation of the Infinity War.
For human characters, draw on real - life military and civilian archetypes. For example, a battle - hardened marine could be modeled after soldiers you see in documentaries. Give them a backstory, like they joined the military to support their family. For Batarian characters, study their in - game lore. Maybe a Batarian trader who gets caught in the crossfire of the war. Their motivation could be to protect their business and family.
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.
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.
First, study the characteristics of both universes. In Naruto, characters often have strong bonds with their comrades. In The Poppy War, characters are shaped by their harsh upbringings. Combine these elements. For example, a character could be a former shinobi who lost their comrades and now in The Poppy War world, is cynical but still holds onto some of the Naruto values deep down.
First, give your OC a backstory. For example, if they grew up in a war - torn area, it would affect their personality and skills. Second, consider their motivation. Are they fighting for revenge, family, or a greater cause? Third, give them flaws. Maybe they're a bit too impulsive or have a fear of heights that they have to overcome in combat situations.
First, you need to study the lore of both universes carefully. Know the capabilities of the characters, the technology, and the overall settings. For example, understanding how the energy shields in Halo work compared to the armor in Gears of War. Then, create a plot that has a logical reason for the crossover, like a dimensional rift.
A plot could revolve around a medic in the war trying to save as many casualties as possible. This could involve difficult decisions like who to treat first when resources are scarce. It would show the moral dilemmas in the chaos of war.