Friendships are the most important kinds of relationships in The Little Prince. These friendships are really unusual, and the common link between all of them is the prince. See, the prince is friends with his flower, the fox, the narrator, and even the snake. It’s hard to imagine how you might make inter-species friendships, but for the prince something like that is never an issue. For him, it’s harder to see how he’d be friends with the businessman or the geographer who are self-involved adults with no interest in relationships or beauty or truth.
The best friend the prince makes in The Little Prince is the fox, because it’s the fox that teaches him the most important idea of all.
The best friend the prince makes in The Little Prince is the narrator, because then the prince has an opportunity to share his wisdom with someone who really needs to hear it.