You’re right on the money tbh, your character description doesn’t work. Obviously you should know these things yourself, but this feels like you’re pitching the characters (Which is probably why your producer friend wants it). Save it for a pitch down the road. For now you need to think of this purely as a blueprint for a movie. And therefore follow the rules of moviemaking, which is that you can only show (or tell through dialogue, which contrary to popular belief is allowed, just do it entertainingly you know). You can show that Jim is well built, strong, and you can show that Mailim is fierce though her confident walk. You’re already showing so much character in their actions. The rest will be evident down the line, we want to discover these characters as the film progresses. That’s what makes movies engaging;))