Another factor driving the antagonist is envy. They see the protagonist having a relatively easy life, at least in their perception. They envy the relationships the protagonist has and the opportunities that seem to come their way effortlessly. This envy fuels their actions to try and bring the protagonist down, thinking that if they can't have those things, neither should the protagonist.
The antagonist also has a bit of a revenge motive. There was a person who once wronged them deeply in their past. This person took away something very precious to the antagonist. So, part of their actions in the novel are to get back at this person, even if it means causing chaos for others.
The antagonist's main motive is power. They grew up in a world where they had no control and were constantly pushed around. So, they are determined to gain as much power as possible to never be in that position again.
Simple. Their motivation might be revenge. In the original story, someone wronged them, and they're set on getting back at that person.
The antagonist's motives are crucial in character analysis. In 'The Lord of the Rings', Sauron's motive is pure domination. He wants to rule Middle - earth and will stop at nothing to achieve it. His actions, like sending out his minions to search for the One Ring, are all in line with this motive. His character is also defined by his power and his ability to instill fear in others.
Well, one of the secrets the protagonist holds is their fear of abandonment. This fear stems from their childhood when their parents left them. It greatly influences their actions throughout the story, like being overly cautious in relationships.
Well, first, you need to prepare some basic questions like what the character's goals are. For example, if it's a detective character, you can ask about the current case they're working on.
The character's past in the original story can be traced through various elements. Their relationships, for instance. If they had a close friend who died, it could explain their current solitude. Also, the place they grew up in might have influenced their values. If it was a rough neighborhood, they might have developed a tough exterior to survive.
Dean in Supernatural fanfiction is often depicted in various ways. He can be shown as a fearless hunter, always ready to face the supernatural threats. Writers may focus on his relationships with other characters like Sam, Cas or Bobby. His loyalty and his sense of humor are also common traits that are explored in fanfiction.
Iruka Sensei could be a really interesting interviewee. He was Naruto's first teacher and someone who really believed in him when others didn't. He could talk about what it was like to teach Naruto and the other students, his own experiences as a ninja, and how he feels about the changes in the Hidden Leaf Village over the years.
In such a fanfiction, the OC son of Grindelwald could have unique magical abilities. Since Grindelwald was a very powerful dark wizard, perhaps the son inherits some extremely potent magic. However, he might use it in unexpected ways. Maybe instead of using it for aggression like his father, he uses it to protect the weak. For instance, he could have the power to control the elements, but he uses it to shield a Muggle village from a dark wizard's attack, defying the common perception of Grindelwald's descendants being inherently evil.
She could be depicted as a really smart character. For instance, she might be the one who helps Caspar with his studies or business decisions in the fanfic world.
You need to do thorough research on the character and their background. Prepare interesting and thought-provoking questions that reveal their personality and motivations.