An immortal OC can also impact the plot by being a source of information. Having lived through so much, they know the secrets of the past, including things about the origin of chakra or the true nature of certain clans. This knowledge can be a driving force for the main characters' quests and can completely change the narrative as they uncover things that were previously hidden.
One interesting aspect is the exploration of eternal life. Characters in immortal oc fanfiction often face unique challenges and experiences that normal mortals don't. For example, they might struggle with outliving their loved ones over and over again, which can lead to complex emotional storylines.
An Immortal OC could be a mentor figure. Since they've been around for so long, they can offer unique insights and wisdom to the younger, less - experienced members of the Justice League.
One interesting idea could be the concept of an immortal OC (original character) interacting with the well - established Naruto universe. For example, their immortality might lead to unique relationships with the mortal characters. They could have witnessed countless historical events in the Naruto world and thus possess a wealth of knowledge that others don't. This could potentially change the course of the story as they might use this knowledge to influence the actions of the main characters like Naruto or Sasuke.
First, you need to create your original character (oc). Decide on their backstory, like how they became immortal. It could be a curse, a gift from a deity, or a scientific experiment gone wrong. Then, think about their personality. Are they benevolent or more self - centered because of their immortality?
A prevalent theme is also about love and friendship. Despite her immortality and ninja skills, she still needs human connections. Sometimes it's a love interest that challenges her views on life and immortality, and at other times it's her friends who support her through tough times. These relationships add depth to the story.
Perhaps the OC is experimented on by an evil organization. The Uzumaki's strong life force makes them a prime candidate. The experiments go wrong (or right, depending on how you look at it) and they end up becoming immortal. This then leads to a story of revenge as they try to take down the organization that changed them forever.
First, give her a unique backstory. Maybe she's an ancient being who has witnessed key events in the Marvel universe. Second, define her powers clearly. For example, if she has immortality, what are the limits? Can she be injured? Third, create interesting relationships. She could be a mentor to new heroes or have a long - standing feud with a villain.
One idea could be that the immortal female OC has lived through different historical periods and uses her knowledge to solve modern-day mysteries. For example, she might have witnessed the fall of ancient civilizations and can now help archaeologists understand things that were lost to time. Another plot could involve her falling in love with a mortal and having to deal with the heartbreak that comes with outliving her lover over and over again. Or perhaps she is on a quest to find others like her, immortals who have been hiding in the world for centuries, and along the way she discovers secrets about the origin of her immortality.
In terms of power levels, the Immortal Mage could have powers that are on par with the likes of Scarlet Witch or Doctor Strange. Their immortality might also come with the ability to regenerate from any injury, making them a formidable force. They could also have the power to travel through different dimensions, which is a common theme in Marvel. This would allow them to access hidden knowledge and artifacts that could be used to either protect or disrupt the Marvel Universe depending on their motives.