A war veteran who has already had many close calls on the battlefield could be a main character. His past experiences of facing death could be the foundation for the fanfiction's story, and he might face new challenges that bring back those old traumas.
Maybe a scientist who, in the pursuit of a dangerous experiment, has a brush with death and then has to deal with the consequences. This character could be very intelligent but also a bit reckless.
One idea could be exploring the backstory of the main character in the fanfiction. Maybe they had a near - death experience in their childhood that shaped who they are now.
Another potential set of new characters could be ancient wizards or witches who were once associated with the concept of the master of death. They could come back to either guide Harry or challenge his claim to the title. This would add a lot of depth to the story as Harry would have to prove himself to these predecessors or learn from their experiences.
There could be a wise old wizard who has knowledge about the true nature of the Master of Death and becomes Harry's mentor. Maybe a powerful magical creature that is drawn to Harry's power and offers its assistance.
Well, 'Brush with Death' might have a theme of redemption. Maybe the main character has made mistakes and is now trying to make amends while avoiding death. Or it could be about the power of hope in the face of near-certain doom.
Sora could be a main character as he is often central in the Keyblade universe. His determination and pure heart would make him a key figure in the war. Another could be Riku, with his complex character and his own journey of growth and redemption.
It could be an adult who had a very difficult childhood and is given a chance to go back and rewrite it. For example, a character who grew up in poverty and now gets to experience a better childhood.
A new, original character could be the main character in a Naruto chains fanfiction. This character could be from a small, unknown ninja village and possess a unique ability to control chains made of some special material. They could come to the Hidden Leaf Village and get involved in the events there, interacting with the well - known Naruto characters.
A fallen angel could be a great main character. They have already experienced a fall from grace and now are faced with these 108 earthly temptations as a chance for redemption. They have knowledge of both good and evil, but still struggle with the earthly allures.
Obviously, the drunk dragon itself can be the main character. It could have a unique personality, perhaps being a bit clumsy and overly friendly when drunk.
Obviously, the black wolf itself could be a main character. It could have a distinct personality, like being brave yet a bit solitary.