With most of the characters I write, I'm never really completely accurate about their age offering descriptions like "mid-twenties" or "His face was covered in wrinkles and his hair completely grey" instead, at least when it comes to human characters. Aliens and supernatural creatures are different. I'm only being specific this time around with a human as it's important to the plot. For my zombie story that's set in Northern Ireland, the closest thing the story has to a "hero" is a single father trying to protect his daughter, who is the only person who gives his life meaning. The single father is a determined and paranoid son of a bitch who'll do anything to protect her apart from kill another human being (the undead are fair game though) as he still has hope and does not want to sink to the same level as the undead. Her age is important though. The first concept I had for her character was that she was an infant but I decided against it. Babies are boring apart from that extra factor of vulnerability, at least in post-apocalyptic stories At the moment I'm thinking she's probably 5-7 years old. My only problem with this is I want a theme, or rather part of his character to be a kind of guilt. He feels guilty that he can't raise her in a more civilized world and that she might not remember her mother. "At least she'll never have to pay taxes" - Currently unnamed single father character (he's still in development too) Yeah, I know this all sounds cliché' as hell but it's a zombie story. Zombies in themselves are cliché' at this point, that and this story is only a side-project. Anyway, at that 5-7 age there's a bit more potential for an interesting character and an interesting father-daughter relationship (or at least as interesting you can get in a ruddy zombie story). I'm against the idea of making her a teenager as I already have a few teenage characters, so I'm keeping her as a child under the age of 13.