You can name that character after his chief trait. It could be "John Slow", "Lazy Daisy", "Tardy Hardy", "Hagar, the Laggard" or whatever else you might think o

You can name that character after his chief trait. It could be "John Slow", "Lazy Daisy", "Tardy Hardy", "Hagar, the Laggard" or whatever else you might think of. Or even literally name them after the trait and make it an allegory. Enmity, on the other hand, can be inferred from the either from the story or from the context, by having one character hurt another another at some point in a way that sets them up for a grudge or by having them compete in a contest. It really isn't necessary to have animals in children stories.