I’d like to find a book/series in where the main protagonist is, old/worn down, but still strong and physically able; think Logan/Wolverine and Kratos from the God of War series. Alternatively, I’d like to find a book/series where the protagonist meets a person of slight importance to the plot, first hating them, but naturally becoming best friends after their shared experiences. I don’t want the friendship to develop for the story, I want it to be natural and not forced. Think of Henry and Hans Capon from the game Kingdom Come.