He is prudent, unyielding, honest and affectionate. It is Roland's old best friend. He said he thought thought thoughtless courage was nothing more than bravado, and prudence was stronger than recklessness, but now he knows it's wrong to some extent. It's because thinking alone doesn't work, and if you're too careful, you'll get hurt. Olivier is a relationship that helps each other with prudence and Roland with unhesitating action.